diff --git a/tools/hgvsparser/.shed.yml b/tools/hgvsparser/.shed.yml
new file mode 100644
index 00000000000..0be98864519
--- /dev/null
+++ b/tools/hgvsparser/.shed.yml
@@ -0,0 +1,9 @@
+name: hgvsparser
+owner: iuc
+description: Parsing and building variant descriptor strings compliant with the HGVS standard
+homepage_url: https://github.com/VariantEffect/hgvsParseR/tree/master
+long_description: |
+    hgvsParseR is an R package for parsing the HGVS strings that are commonly used to describe variation. 
+remote_repository_url: https://github.com/galaxyproject/tools-iuc/tree/master/tools/hgvsparser/
+categories:
+  - Variant Analysis
diff --git a/tools/hgvsparser/buildHGVS.R b/tools/hgvsparser/buildHGVS.R
new file mode 100644
index 00000000000..55d4c55e06c
--- /dev/null
+++ b/tools/hgvsparser/buildHGVS.R
@@ -0,0 +1,512 @@
+# Copyright (C) 2018  Jochen Weile, Roth Lab
+#
+# This file is part of hgvsParseR.
+#
+# hgvsParseR is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# hgvsParseR is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with hgvsParseR.  If not, see <https://www.gnu.org/licenses/>.
+
+#' Genomic HGVS Builder 
+#'
+#' A constructor for a genomic-level HGVS builder object. The object contains a collection of functions
+#' for building genomic HGVS strings.
+#' 
+#' The resulting object encapsulates the following functions:
+#' \itemize{
+#' 	\item{substitution(pos,ancestral,variant)} Genomic substitution variants. 
+#'    pos = position (integer); ancestral = ancestral nucleotide [ACGT]; 
+#'    variant = variant nucleotide [ACGT]
+#' 	\item{deletion(start,stop)} Genomic deletion. start = start position (integer);
+#'    stop = stop position (integer)
+#' 	\item{inversion(start,stop)} Genomic inversion. start = start position (integer);
+#'    stop = stop position (integer)
+#' 	\item{duplication(start,stop)} Genomic duplication. start = start position (integer);
+#'    stop = stop position (integer)
+#' 	\item{insertion(start,variant)} Genomic insertion. start = position immediately preceeding 
+#'    the insertion (integer); seq = inserted nucleotide sequence [ACGT]+
+#' 	\item{delins(start,stop,variant)} Genomic deletion and insertion. start = start position (integer); 
+#'    stop = stop position relative to the reference (integer); seq = inserted nucleotide sequence [ACGT]+
+#'  \item{cis(...)} Multi-variant phased in cis. Parameters are genomic HGVS strings for the 
+#'    corresponding single mutants
+#'  \item{trans(...)} Multi-variant phased in trans. Parameters are genomic HGVS strings for the 
+#'    corresponding single mutants
+#'  \item{nophase(...)} Multi-variant with unknown phasing. Parameters are genomic HGVS strings for the 
+#'    corresponding single mutants
+#' }
+#' 
+#' @return A \code{hgvs.builder.g} object with functions for building genomic HGVS strings. 
+#'   The individual functions return single-element character vectors containing these strings.
+#' @keywords HGVS builder
+#' @export
+#' @examples
+#' builder <- new.hgvs.builder.g()
+#' string1 <- builder$substitution(123,"A","G")
+#' string2 <- builder$delins(123,129,"ATTG")
+#' string3 <- with(builder,cis(substitution(123,"A","C"),substitution(231,"G","A")))
+
+new.hgvs.builder.g <- function() {
+
+	substitution <- function(pos,ancestral,variant) {
+		if (!is.numeric(pos) || pos < 1) stop("position must be a positive integer")
+		if (!is.character(ancestral) || !(ancestral %in% c("A","C","G","T"))) stop("ancestral must be single nucleotide")
+		if (!is.character(variant) || !(variant %in% c("A","C","G","T"))) stop("variant must be single nucleotide")
+		paste0("g.",pos,ancestral,">",variant)
+	}
+
+	deletion <- function(start,stop) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (start > stop) stop("start must be upstream of stop")
+		paste0("g.",start,"_",stop,"del")
+	}
+
+	inversion <- function(start,stop) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (start > stop) stop("start must be upstream of stop")
+		paste0("g.",start,"_",stop,"inv")
+	}
+
+	duplication <- function(start,stop) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (start > stop) stop("start must be upstream of stop")
+		paste0("g.",start,"_",stop,"dup")
+	}
+
+	insertion <- function(start,seq) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.character(seq) || regexpr("^[ACGT]+$",seq) < 1) stop("variant must be nucleotide sequence")
+		paste0("g.",start,"_",start+1,"ins",seq)
+	}
+
+	delins <- function(start,stop,seq) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (start > stop) stop("start must be upstream of stop")
+		if (!is.character(seq) || regexpr("^[ACGT]+$",seq) < 1) stop("variant must be nucleotide sequence")
+		paste0("g.",start,"_",stop,"delins",seq)
+	}
+
+	cis <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="g.")) stop("all arguments must be genomic HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("g.[",paste(bodies,collapse=";"),"]")
+	}
+
+	trans <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="g.")) stop("all arguments must be genomic HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("g.[",paste(bodies,collapse="];["),"]")
+	}
+
+	nophase <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="g.")) stop("all arguments must be genomic HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("g.[",paste(bodies,collapse="(;)"),"]")
+	}
+
+	return(structure(list(
+		substitution=substitution,
+		deletion=deletion,
+		inversion=inversion,
+		duplication=duplication,
+		insertion=insertion,
+		delins=delins,
+		cis=cis,
+		trans=trans,
+		nophase=nophase
+	),class="hgvs.builder.g"))
+}
+
+print.hgvs.builder.g <- function() {
+	cat("Genomic HGVS string builder. Use $ operator to access functions.")
+}
+
+
+
+#' Coding Sequence HGVS Builder 
+#'
+#' A constructor for a CDS (=coding sequence) HGVS builder object. The object contains a collection of functions
+#' for building CDS HGVS strings.
+#' The resulting object encapsulates the following functions:
+#' \itemize{
+#' 	\item{substitution(pos,ancestral,variant,posOffset=0)} CDS substitution variants. 
+#'    pos = position (integer); ancestral = ancestral nucleotide [ACGT]; 
+#'    variant = variant nucleotide [ACGT]; posOffset = offset from the position when
+#'    crossing exon-intron borders (integer, defaults to 0)
+#' 	\item{deletion(start,stop,startOffset=0,stopOffset=0)} CDS deletion. start = start position (integer);
+#'    stop = stop position (integer); startOffset = offset from the start position when
+#'    crossing exon-intron borders (integer, defaults to 0); stopOffset = offset from the 
+#'    stop position when crossing exon-intron borders (integer, defaults to 0)
+#' 	\item{inversion(start,stop,startOffset=0,stopOffset=0)} CDS inversion. start = start position (integer);
+#'    stop = stop position (integer); startOffset = offset from the start position when
+#'    crossing exon-intron borders (integer, defaults to 0); stopOffset = offset from the 
+#'    stop position when crossing exon-intron borders (integer, defaults to 0)
+#' 	\item{duplication(start,stop,startOffset=0,stopOffset=0)} CDS duplication. start = start position (integer);
+#'    stop = stop position (integer); startOffset = offset from the start position when
+#'    crossing exon-intron borders (integer, defaults to 0); stopOffset = offset from the 
+#'    stop position when crossing exon-intron borders (integer, defaults to 0)
+#' 	\item{insertion(start,variant,startOffset=0)} CDS insertion. start = position immediately preceeding 
+#'    the insertion (integer); seq = inserted nucleotide sequence [ACGT]+ ; 
+#'    startOffset = offset from the start position when crossing exon-intron borders 
+#'    (integer, defaults to 0)
+#' 	\item{delins(start,stop,variant,startOffset=0,stopOffset=0)} CDS deletion and insertion. start = start position (integer); 
+#'    stop = stop position relative to the reference (integer); 
+#'    seq = inserted nucleotide sequence [ACGT]+ ; startOffset = offset from the start position when
+#'    crossing exon-intron borders (integer, defaults to 0); stopOffset = offset from the 
+#'    stop position when crossing exon-intron borders (integer, defaults to 0)
+#'  \item{cis(...)} Multi-variant phased in cis. Parameters are coding HGVS strings for the 
+#'    corresponding single mutants
+#'  \item{trans(...)} Multi-variant phased in trans. Parameters are coding HGVS strings for the 
+#'    corresponding single mutants
+#'  \item{nophase(...)} Multi-variant with unknown phasing. Parameters are coding HGVS strings for the 
+#'    corresponding single mutants
+#' }
+#' 
+#' @return A \code{hgvs.builder.c} object with functions for building coding HGVS strings. 
+#'   The individual functions return single-element character vectors containing these strings.
+#' @keywords HGVS builder
+#' @export
+#' @examples
+#' builder <- new.hgvs.builder.c()
+#' string1 <- builder$substitution(123,"A","G",posOffset=2)
+#' string2 <- builder$delins(123,129,"ATTG")
+#' string3 <- with(builder,cis(substitution(123,"A","C"),substitution(231,"G","A")))
+
+new.hgvs.builder.c <- function() {
+
+	offsetStr <- function(offset) {
+		if (offset==0) {
+			""
+		} else if (offset > 0) {
+			paste0("+",offset)
+		} else if (offset < 0) {
+			as.character(offset)
+		}
+	}
+
+	substitution <- function(pos,ancestral,variant,posOffset=0) {
+		if (!is.numeric(pos) || pos < 1) stop("position must be a positive integer")
+		if (!is.numeric(posOffset)) stop("offset must be an integer")
+		if (!is.character(ancestral) || !(ancestral %in% c("A","C","G","T"))) stop("ancestral must be single nucleotide")
+		if (!is.character(variant) || !(variant %in% c("A","C","G","T"))) stop("variant must be single nucleotide")
+		paste0("c.",pos,offsetStr(posOffset),ancestral,">",variant)
+	}
+
+	deletion <- function(start,stop,startOffset=0,stopOffset=0) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (!is.numeric(startOffset)) stop("offset must be an integer")
+		if (!is.numeric(stopOffset)) stop("offset must be an integer")
+		if (start+startOffset > stop+stopOffset) stop("start must be before stop")
+		paste0("c.",start,offsetStr(startOffset),"_",stop,offsetStr(stopOffset),"del")
+	}
+
+	inversion <- function(start,stop,startOffset=0,stopOffset=0) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (!is.numeric(startOffset)) stop("offset must be an integer")
+		if (!is.numeric(stopOffset)) stop("offset must be an integer")
+		if (start+startOffset >= stop+stopOffset) stop("start must be before stop")
+		paste0("c.",start,offsetStr(startOffset),"_",stop,offsetStr(stopOffset),"inv")
+	}
+
+	duplication <- function(start,stop,startOffset=0,stopOffset=0) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (!is.numeric(startOffset)) stop("offset must be an integer")
+		if (!is.numeric(stopOffset)) stop("offset must be an integer")
+		if (start+startOffset > stop+stopOffset) stop("start must be before stop")
+		paste0("c.",start,offsetStr(startOffset),"_",stop,offsetStr(stopOffset),"dup")
+	}
+
+	insertion <- function(start,seq,startOffset=0) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.character(seq) || regexpr("^[ACGT]+$",seq) < 1) {
+			stop("variant must be nucleotide sequence")
+		}
+		if (!is.numeric(startOffset)) stop("offset must be an integer")
+		stop <- if (startOffset != 0) start else start+1
+		stopOffset <- if (startOffset != 0) startOffset+1 else startOffset
+		paste0("c.",start,offsetStr(startOffset),"_",stop,offsetStr(stopOffset),"ins",seq)
+	}
+
+	delins <- function(start,stop,seq,startOffset=0,stopOffset=0) {
+		if (!is.numeric(start)) stop("start must be an integer")
+		if (!is.numeric(stop)) stop("stop must be an integer")
+		if (!is.numeric(startOffset)) stop("offset must be an integer")
+		if (!is.numeric(stopOffset)) stop("offset must be an integer")
+		if (start+startOffset > stop+stopOffset) stop("start must be before stop")
+		if (!is.character(seq) || regexpr("^[ACGT]+$",seq) < 1) stop("variant must be nucleotide sequence")
+		paste0("c.",start,offsetStr(startOffset),"_",stop,offsetStr(stopOffset),"delins",seq)
+	}
+
+	cis <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="c.")) stop("all arguments must be coding HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("c.[",paste(bodies,collapse=";"),"]")
+	}
+
+	trans <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="c.")) stop("all arguments must be coding HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("c.[",paste(bodies,collapse="];["),"]")
+	}
+
+	nophase <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="c.")) stop("all arguments must be coding HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("c.[",paste(bodies,collapse="(;)"),"]")
+	}
+
+	return(structure(list(
+		substitution=substitution,
+		deletion=deletion,
+		inversion=inversion,
+		duplication=duplication,
+		insertion=insertion,
+		delins=delins,
+		cis=cis,
+		trans=trans,
+		nophase=nophase
+	),class="hgvs.builder.c"))
+}
+
+print.hgvs.builder.c <- function() {
+	cat("Coding-sequence HGVS string builder. Use $ operator to access functions.")
+}
+
+
+
+#' Protein HGVS Builder 
+#'
+#' A constructor for a protein-level HGVS builder object. The object contains a collection of functions
+#' for building protein HGVS strings.
+#' 
+#' The resulting object encapsulates the following functions:
+#' \itemize{
+#'  \item{synonymous()} A synonymous variant. No parameters required.
+#'  \item{synonymous(pos,ancestral)} Unofficial (yet frequently used) version of synonymous variant syntax. 
+#'    pos = position (integer); ancestral = ancestral amino acid in one-letter or three-letter code.
+#' 	\item{substitution(pos,ancestral,variant)} AA substitution variants. 
+#'    pos = position (integer); ancestral = ancestral amino acid in one-letter or three-letter code; 
+#'    variant = variant amino acid in one-letter or three-letter code
+#' 	\item{deletion(startPos,startAA,endPos,endAA)} AA deletion. startPos = start position (integer);
+#'    startAA = start amino acid in one-letter or three-letter code;
+#'    endPos = stop position (integer); endAA = start amino acid in one-letter or three-letter code
+#' 	\item{duplication(startPos,startAA,endPos,endAA)} AA duplication. startPos = start position (integer);
+#'    startAA = start amino acid in one-letter or three-letter code;
+#'    endPos = stop position (integer); endAA = start amino acid in one-letter or three-letter code
+#' 	\item{insertion(leftPos,leftAA,rightAA,seq)} AA insertion. leftPos = position immediately preceeding 
+#'    the insertion (integer); leftAA = corresponding amino acid in one-letter or three-letter code;
+#'    rightAA = amino acid to the right of the insertion, in one-letter or three-letter code;
+#'    seq = inserted amino acid sequence, given as a character vector containing the individual
+#'    one-letter or three-letter amino acid codes.
+#' 	\item{delins(startPos,startAA,endPos,endAA,seq)} AA deletion and insertion. 
+#'    startPos = start position (integer);
+#'    startAA = start amino acid in one-letter or three-letter code;
+#'    endPos = stop position (integer); endAA = start amino acid in one-letter or three-letter code;
+#'    seq = inserted amino acid sequence, given as a character vector containing the individual
+#'    one-letter or three-letter amino acid codes.
+#'  \item{frameshift(startPos,startAA,variantAA=NA,newStop=NA)} Frameshift variant. 
+#'    startPos = start position (integer);
+#'    startAA = start amino acid in one-letter or three-letter code;
+#'    variantAA = amino acid replacing the start position in the frameshift sequence, 
+#'    given in one-letter or three-letter code, or \code{NA} to omit (default);
+#'    newStop = the position of the nearest coding resulting from the frameshift, 
+#'    or \code{NA} to omit (default).
+#'  \item{cis(...)} Multi-variant phased in cis. Parameters are coding HGVS strings for the 
+#'    corresponding single mutants. As phasing in trans would be nonsensical in a protein context,
+#'    the \code{trans()} and \code{nophase()} methods are not provided here.
+#' }
+#' 
+#' @return A \code{hgvs.builder.g} object with functions for building genomic HGVS strings. 
+#'   The individual functions return single-element character vectors containing these strings.
+#' @keywords HGVS builder
+#' @export
+#' @examples
+#' builder <- new.hgvs.builder.g()
+#' string1 <- builder$substitution(123,"R","K")
+#' string2 <- builder$delins(123,"Arg",152,"Leu",c("Lys","Trp","Ser"))
+#' string3 <- with(builder,cis(substitution(123,"R","K"),deletion(125,"S",152,"L")))
+
+
+new.hgvs.builder.p <- function(aacode=c(1,3)) {
+
+	aacode <- aacode[[1]]
+	if (!is.numeric(aacode) && !(aacode %in% c(1,3))) {
+		stop("Invalid aacode parameter, only 1 or 3 allowed!")
+	}
+	
+	one2three <- c(A="Ala",C="Cys",D="Asp",E="Glu",F="Phe",G="Gly",H="His",
+		I="Ile",K="Lys",L="Leu",M="Met",N="Asn",P="Pro",Q="Gln",R="Arg",
+		S="Ser",T="Thr",V="Val",W="Trp",Y="Tyr",`*`="Ter")
+	three2one <- c(Ala="A",Arg="R",Asn="N",Asp="D",Cys="C",Gln="Q",Glu="E",
+		Gly="G",His="H",Ile="I",Leu="L",Lys="K",Met="M",Phe="F",Pro="P",
+		Ser="S",Thr="T",Trp="W",Tyr="Y",Val="V",Ter="*")
+
+	enforceCode <- function(aa) {
+		if (aa %in% one2three) {
+			if (aacode == 1) {
+				three2one[[aa]]
+			} else {
+				aa
+			}
+		} else if (aa %in% three2one) {
+			if (aacode == 1) {
+				aa
+			} else {
+				one2three[[aa]]
+			}
+		} else {
+			stop("Invalid AA code")
+		}
+	}
+
+	synonymous <- function(pos=NULL,ancestral=NULL) {
+		if (is.null(pos) || is.null(ancestral)) {
+			return("p.=")
+		}
+		if (!is.numeric(pos) || pos < 1) stop("position must be a positive integer")
+		if (!is.character(ancestral) || !(ancestral %in% c(one2three,three2one))) stop("ancestral must be single amimo acid")
+		ancestral <- enforceCode(ancestral)
+		paste0("p.",ancestral,pos,"=")
+	}
+
+	substitution <- function(pos,ancestral,variant) {
+		if (!is.numeric(pos) || pos < 1) stop("position must be a positive integer")
+		if (!is.character(ancestral) || !(ancestral %in% c(one2three,three2one))) stop("ancestral must be single amimo acid")
+		if (!is.character(variant) || !(variant %in% c(one2three,three2one))) stop("variant must be single amino acid")
+		ancestral <- enforceCode(ancestral)
+		variant <- enforceCode(variant)
+		paste0("p.",ancestral,pos,variant)
+	}
+
+	deletion <- function(startPos,startAA,endPos,endAA) {
+		if (!is.numeric(startPos) || startPos < 1) stop("position must be a positive integer")
+		if (!is.numeric(endPos) || endPos < 1) stop("position must be a positive integer")
+		if (startPos > endPos) stop("start must be upstream of stop")
+		if (!is.character(startAA) || !(startAA %in% c(one2three,three2one))) stop("startAA must be single amimo acid")
+		if (!is.character(endAA) || !(endAA %in% c(one2three,three2one))) stop("endAA must be single amimo acid")
+		startAA <- enforceCode(startAA)
+		endAA <- enforceCode(endAA)
+		if (startPos==endPos) {
+			paste0("p.",startAA,startPos,"del")
+		} else {
+			paste0("p.",startAA,startPos,"_",endAA,endPos,"del")
+		}
+	}
+
+	duplication <- function(startPos,startAA,endPos,endAA) {
+		if (!is.numeric(startPos) || startPos < 1) stop("position must be a positive integer")
+		if (!is.numeric(endPos) || endPos < 1) stop("position must be a positive integer")
+		if (startPos >= endPos) stop("start must be upstream of stop")
+		if (!is.character(startAA) || !(startAA %in% c(one2three,three2one))) 
+			stop("startAA must be single amimo acid")
+		if (!is.character(endAA) || !(endAA %in% c(one2three,three2one))) 
+			stop("endAA must be single amimo acid")
+		startAA <- enforceCode(startAA)
+		endAA <- enforceCode(endAA)
+		paste0("p.",startAA,startPos,"_",endAA,endPos,"dup")
+	}
+
+	insertion <- function(leftPos,leftAA,rightAA,seq) {
+		if (!is.numeric(leftPos) || leftPos < 1) stop("position must be a positive integer")
+		if (!is.character(leftAA) || !(leftAA %in% c(one2three,three2one))) 
+			stop("leftAA must be single amimo acid")
+		if (!is.character(rightAA) || !(rightAA %in% c(one2three,three2one))) 
+			stop("rightAA must be single amimo acid")
+		if (!is.character(seq) || !all(sapply(seq,function(x) x %in% c(one2three,three2one))))
+			stop("seq must be a vector of amino acids")
+		rightPos <- leftPos+1
+		leftAA <- enforceCode(leftAA)
+		rightAA <- enforceCode(rightAA)
+		seq <- paste(sapply(seq,enforceCode),collapse="")
+		paste0("p.",leftAA,leftPos,"_",rightAA,rightPos,"ins",seq)
+	}
+
+	delins <- function(startPos,startAA,endPos,endAA,seq) {
+		if (!is.numeric(startPos) || startPos < 1) stop("position must be a positive integer")
+		if (!is.numeric(endPos) || endPos < 1) stop("position must be a positive integer")
+		if (startPos > endPos) stop("start must be upstream of stop")
+		if (!is.character(startAA) || !(startAA %in% c(one2three,three2one))) 
+			stop("startAA must be single amimo acid")
+		if (!is.character(endAA) || !(endAA %in% c(one2three,three2one))) 
+			stop("endAA must be single amimo acid")
+		if (!is.character(seq) || !all(sapply(seq,function(x) x %in% c(one2three,three2one))))
+			stop("seq must be a vector of amino acids")
+		startAA <- enforceCode(startAA)
+		endAA <- enforceCode(endAA)
+		seq <- paste(sapply(seq,enforceCode),collapse="")
+		paste0("p.",startAA,startPos,"_",endAA,endPos,"delins",seq)
+	}
+
+	frameshift <- function(startPos,startAA,variantAA=NA,newStop=NA) {
+		if (!is.numeric(startPos) || startPos < 1) stop("position must be a positive integer")
+		if (!is.na(newStop) && (!is.numeric(newStop) || newStop < 1)) stop("position must be a positive integer")
+		if (!is.character(startAA) || !(startAA %in% c(one2three,three2one))) 
+			stop("startAA must be single amimo acid or NA")
+		if (!is.na(variantAA) && (!is.character(startAA) || !(startAA %in% c(one2three,three2one)))) 
+			stop("variantAA must be single amimo acid or NA")
+		startAA <- enforceCode(startAA)
+		if (is.na(variantAA)) {
+			variantAA <- ""
+		} else {
+			variantAA <- enforceCode(variantAA)
+		}
+		if (is.na(newStop)) {
+			newStop <- "" 
+		} else {
+			newStop <- paste0("*",newStop)
+		}
+		paste0("p.",startAA,startPos,variantAA,"fs",newStop)
+	}
+	
+	cis <- function(...) {
+		strings <- list(...)
+		if (!all(sapply(strings,is.character))) stop("all arguments must be HGVS strings")
+		strings <- unlist(strings)
+		if (!all(substr(strings,1,2)=="p.")) stop("all arguments must be protein HGVS strings")
+		bodies <- substr(strings,3,nchar(strings))
+		paste0("p.[",paste(bodies,collapse=";"),"]")
+	}
+
+	return(structure(list(
+		synonymous=synonymous,
+		substitution=substitution,
+		deletion=deletion,
+		duplication=duplication,
+		insertion=insertion,
+		delins=delins,
+		frameshift=frameshift,
+		cis=cis
+	),class="hgvs.builder.p"))
+}
\ No newline at end of file
diff --git a/tools/hgvsparser/hgvsparser.xml b/tools/hgvsparser/hgvsparser.xml
new file mode 100644
index 00000000000..38ed5998d48
--- /dev/null
+++ b/tools/hgvsparser/hgvsparser.xml
@@ -0,0 +1,152 @@
+<tool id="hgvsparser" name="hgvsParseR" version="@VERSION@+galaxy@GALAXY_VERSION@" profile="20.09"
+      license="GPL-3.0" >
+    <description>parsing and building variant descriptor strings compliant with the HGVS standard</description>
+    <macros>
+        <token name="@VERSION@">0.1.0</token>
+        <token name="@GALAXY_VERSION@">0</token>
+    </macros>
+    <requirements>
+        <requirement type="package" version="4.0">r-base</requirement>
+    </requirements>
+    <required_files>
+        <include path="parseHGVS.R" />
+        <include path="buildHGVS.R" />
+    </required_files>
+    <command detect_errors="exit_code"><![CDATA[
+Rscript '$configscript' > tmp_output.csv
+    ]]>
+   </command>
+    <configfiles>
+        <configfile name="configscript"><![CDATA[
+input_file <- '$action_choice.input_file'
+input_data <- read.csv(input_file, stringsAsFactors = FALSE)
+#if $action_choice.do == "parse":       
+    source('$__tool_directory__/parseHGVS.R')
+    #if $variant_format == "vcf":
+    values <- paste0("p.", input_data$'$pos_col')
+    #else:
+    values <- input_data$'$pos_col'
+    #end if
+    out_data <- parseHGVS(values)    
+    result <- data.frame(
+        hgvs = out_data$'hgvs',
+        subject = out_data$'subject',
+        type = out_data$'type',
+        start = out_data$'start',
+        ancestral = out_data$'ancestral',
+        variant = out_data$'variant'
+        )
+#else if $action_choice.do == "build":
+source('$__tool_directory__/buildHGVS.R')
+result <- data.frame()
+for (i in 1:nrow(input_data)) {
+    startPos <- input_data$'$startPos'[i]
+    startAA <- input_data$'$startAA'[i]
+    endAA <- input_data$'$endAA'[i]
+    #if $variant_format == "vcf":
+        builder <- new.hgvs.builder.p(1)
+        result_build <- sub("^p\\.", "", with(builder, substitution(startPos, startAA, endAA)))
+    #else if $variant_format == "classic":
+        builder <- new.hgvs.builder.p(1)
+        result_build <- with(builder, substitution(startPos, startAA, endAA))
+    #else:
+        builder <- new.hgvs.builder.p(3)
+        result_build <- with(builder, substitution(startPos, startAA, endAA))
+    #end if
+  result_row <- cbind(input_data[i, ], result_build)
+  result <- rbind(result, result_row)
+}
+#end if
+write.csv(result, file = "tmp_output.csv", row.names = FALSE, na="")
+]]>
+        </configfile>
+    </configfiles>
+    <inputs>
+        <conditional name="action_choice">
+            <param name="do" type="select" label="Choose the action" >
+                <option value="parse" selected="true">parse</option>
+                <option value="build">build</option>
+            </param>
+            <when value="parse" >
+                <param name="input_file" type="data" format="csv" label="Input file" help="File containing column with variant descriptor strings" />
+                <param name="pos_col" type="select" label="Variant descriptor column" help="The name of the column in the file that contains the variant descriptor, e.g. p.Glu214aAla (HGVS notation), p.A435D (classic notation), A435D (amino acid change descriptor format used in VCF)">
+                    <options>
+                        <filter type="data_meta" ref="input_file" key="column_names"/>
+                    </options>
+                </param>
+            </when>
+            <when value="build">
+                <param name="input_file" type="data" format="csv" label="Input file" help="File containing columns with mutation position, ancestral amino acid, and variant amino acid" />
+                <param name="startPos" type="select" label="Mutation position">
+                    <options>
+                        <filter type="data_meta" ref="input_file" key="column_names"/>
+                    </options>
+                </param>
+                <param name="startAA" type="select" label="Ancestral amino acid">
+                    <options>
+                        <filter type="data_meta" ref="input_file" key="column_names"/>
+                    </options>
+                </param>
+                <param name="endAA" type="select" label="Variant amino acid">
+                    <options>
+                        <filter type="data_meta" ref="input_file" key="column_names"/>
+                    </options>
+                </param>
+            </when>
+        </conditional>
+        <param name="variant_format" type="select" label="Variant descriptor format" help="For parsing: choose the format to parse. For building: choose the desired format for the result, regardless of the input format.">
+            <option value="hgvs" selected="true">HGVS (e.g., p.Glu214aAla)</option>
+            <option value="classic">classic (e.g., p.A435D)</option>
+            <option value="vcf">Amino Acid Change used in VCF (e.g., A435D)</option>
+        </param>
+    </inputs>
+    <outputs>
+        <data name="outfile_parsed" format="csv" from_work_dir="tmp_output.csv" label="parseHGVS result on ${on_string}">
+            <filter>action_choice['do'] == 'parse'</filter>
+        </data>
+        <data name="outfile_built" format="csv" from_work_dir="tmp_output.csv" label="buildHGVS result on ${on_string}">
+            <filter>action_choice['do'] == 'build'</filter>
+        </data>
+    </outputs>
+    <tests>
+    <test expect_num_outputs="1">
+        <!--test 1: parse-->
+        <param name="variant_format" value="hgvs"/>
+        <conditional name="action_choice">
+            <param name="do" value="parse"/>
+            <param name="input_file" value="inputParser.csv"/>
+            <param name="pos_col" value="hgvs_pro"/>
+        </conditional>
+        <output name="outfile_parsed" ftype="csv">
+            <assert_contents>
+                <has_text text="ancestral"/>
+            </assert_contents>
+        </output>
+    </test>    
+    <test expect_num_outputs="1">
+        <!--test 2: build-->
+        <param name="variant_format" value="hgvs"/>
+        <conditional name="action_choice">
+            <param name="do" value="build"/>
+            <param name="input_file" value="inputBuilder.csv"/>
+            <param name="startPos" value="start"/>
+            <param name="startAA" value="ancestral"/>
+            <param name="endAA" value="variant"/>
+        </conditional>
+        <output name="outfile_built" ftype="csv">
+            <assert_contents>
+                <has_text text="build"/>
+            </assert_contents>
+        </output>
+    </test>
+    </tests>
+    <help><![CDATA[
+**What it does**
+
+This tool parses and builds variant descriptor strings compliant with the HGVS standard.
+
+    ]]></help>
+    <citations>
+        <citation type="doi">10.1186/s13059-019-1845-6</citation>
+    </citations>
+</tool>
\ No newline at end of file
diff --git a/tools/hgvsparser/parseHGVS.R b/tools/hgvsparser/parseHGVS.R
new file mode 100644
index 00000000000..da8552b7cb8
--- /dev/null
+++ b/tools/hgvsparser/parseHGVS.R
@@ -0,0 +1,734 @@
+# Copyright (C) 2018  Jochen Weile, Roth Lab
+#
+# This file is part of hgvsParseR.
+#
+# hgvsParseR is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# hgvsParseR is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with hgvsParseR.  If not, see <https://www.gnu.org/licenses/>.
+
+#' HGVS Parser 
+#'
+#' Parses HGVS strings
+#' @param strings A character vector containing the HGVS strings
+#' @param aacode allowed values: 1, 3, or NA. Determines whether 1-letter codes or 3-letter codes should be forced. NA uses input format.
+#' @return A \code{data.frame} with the following columns: 
+#' @keywords HGVS parsing
+#' @export
+#' @examples
+#' result <- parseHGVS(c("g.1318G>T","c.123_125inv","p.R123_L152del"))
+
+parseHGVS <- function(strings,aacode=c(NA,1,3)) {
+
+	#Check that parameters are valid
+	if (!is.character(strings)) {
+		stop("Input for 'parse' function must be a character vector! Found '",class(strings),"' instead.")
+	}
+
+	aacode <- aacode[[1]]
+	if (!is.na(aacode) && !(aacode %in% c(1,3))) {
+		warning("Invalid aacode parameter, defaulting to NA!")
+		aacode <- NA
+	}
+	
+	#Helper function: turns a list of lists (lol) in to a dataframe
+	to.df <- function(lol) {
+		colnames <- unique(do.call(c,lapply(lol,names)))
+		columns <- lapply(colnames,function(cn) sapply(lol,function(row) {
+			if (cn %in% names(row)) row[[cn]] else NA
+		}))
+		names(columns) <- colnames
+		empty <- which(sapply(columns,function(xs)all(is.na(xs))))
+		columns[empty] <- NULL
+		do.call(data.frame,columns)
+	}
+
+	# ###
+	# # Binds matrices of same size together to a 3D matrix, analogously
+	# # to cbind and rbind.
+	# #
+	# zbind <- function(...) {
+	# 	x <- list(...)
+	# 	y <- array(0,dim=c(nrow(x[[1]]),ncol(x[[1]]),length(x)),dimnames=dimnames(x[[1]]))
+	# 	for (i in 1:length(x)) y[,,i] <- x[[i]]
+	# 	y
+	# }
+
+
+	###
+	# Function to *locally* excise regex groups from string vectors.
+	# I.e. only extract the first occurrence of each group within each string.
+	# x = string vector
+	# re = regular expression with groups
+	#
+	extract.groups <- function(x, re) {
+		matches <- regexpr(re,x,perl=TRUE)
+		start <- attr(matches,"capture.start")
+		end <- start + attr(matches,"capture.length") - 1
+		do.call(cbind,lapply(1:ncol(start), function(i) {
+			sapply(1:nrow(start),function(j){
+				if (start[j,i] > -1) substr(x[[j]],start[j,i],end[j,i]) else NA
+			})
+		}))
+	}
+
+	# ###
+	# # Function to *globally* excise regex groups from string vectors.
+	# # x = string vector
+	# # re = regular expression with groups
+	# #
+	# global.extract.groups <- function(x,re) {
+	#     all.matches <- gregexpr(re,x,perl=TRUE)
+	#     mapply(function(matches,x) {
+	#         start <- attr(matches,"capture.start")
+	#         end <- start + attr(matches,"capture.length") - 1
+	#         apply(zbind(start,end),c(1,2),function(pos) substr(x,pos[[1]],pos[[2]]) )
+	#     },matches=all.matches,x=x,SIMPLIFY=FALSE)
+	# }
+
+	###
+	# Helper function to split multi-mutant bodies into their individual 
+	# elements. Returns a vector of strings containing these elements. 
+	# An attribute "multi" is attached to the vector, detailing the type 
+	# of multi-mutant
+	# 
+	splitMulti <- function(body) {
+		if (regexpr("\\[.+\\];\\[.+\\]",body) > 0) {
+			out <- strsplit(substr(body,2,nchar(body)-1),"\\];\\[")[[1]]
+			attr(out,"multi") <- "trans"
+		} else if (regexpr("\\[.+\\(;\\).+\\]",body) > 0) {
+			out <- strsplit(substr(body,2,nchar(body)-1),"\\(;\\)")[[1]]
+			attr(out,"multi") <- "unknown"
+		} else if (regexpr("\\[.+;.+\\]",body) > 0) {
+			out <- strsplit(substr(body,2,nchar(body)-1),";")[[1]]
+			attr(out,"multi") <- "cis"
+		} else {
+			out <- body
+			attr(out,"multi") <- "single"
+		}
+		return(out)
+	}
+
+	###
+	# Helper function:
+	# Given an HGVS body and a list of regexes corresponding to types,
+	# find the (first) matching type.
+	findType <- function(body,types) {
+		i <- 0
+		found <- done <- FALSE
+		while (!found && !done) {
+			found <- regexpr(types[[i <- i+1]],body) > 0
+			done <- i >= length(types)
+		}
+		if (found) {
+			return(names(types)[[i]])
+		} else {
+			return("invalid")
+		}
+	}
+
+	out <- lapply(strings,function(s) {
+
+		if (regexpr("^[gcnmrp]\\.",s) < 1) {
+			return(list(list(hgvs=s,subject="invalid",type="invalid")))
+		}
+
+		body <- substr(s,3,nchar(s))
+
+		subbodies <- splitMulti(body)
+
+		subjects <- c(
+			g="genomic",c="coding",n="noncoding",
+			m="mitochondrial",r="rna",p="protein"
+		)
+		subject <- subjects[[substr(s,1,1)]]
+
+		if (subject=="genomic") {
+
+			types <- c(
+				substitution="\\d+[ACGT]>[ACGT]", singledeletion="^\\d+del$",
+				deletion="\\d+_\\d+del$",inversion="\\d+_\\d+inv",
+				duplication="\\d+_\\d+dup",insertion="\\d+_\\d+ins[ATCG]+",
+				conversion="\\d+_\\d+con\\d+_\\d+",delins="\\d+_\\d+delins[ATCG]+",
+				amplification="\\d+_\\d+\\[\\d+\\]"
+			)
+			
+			phasing <- attr(subbodies,"multi")
+			isMulti <- length(subbodies) > 1
+			
+			lapply(1:length(subbodies), function(i.multi) {
+				body <- subbodies[[i.multi]]
+
+				type <- findType(body,types)
+
+				if (type == "substitution") {
+					groups <- extract.groups(body,"(\\d+)([ACGT])>([ACGT])")[1,]
+					position <- as.integer(groups[[1]])
+					ancestral <- groups[[2]]
+					variant <- groups[[3]]
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=position,ancestral=ancestral,variant=variant))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=position,
+							ancestral=ancestral,variant=variant))
+					}
+
+				} else if (type == "singledeletion") {
+					groups <- extract.groups(body,"(\\d+)del")[1,]
+					position <- as.integer(groups[[1]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=position))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=position))
+					}
+
+				} else if (type == "deletion") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)del")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,end=end))
+					}
+
+				} else if (type == "inversion") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)inv")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,end=end))
+					}
+
+				} else if (type == "duplication") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)dup")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,end=end))
+					}
+
+				} else if (type == "insertion") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)ins([ATCG]+)")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					if (abs(end-start)!=1) {
+						warning("Invalid insertion definition: 
+							Start and end positions must be adjacent!")
+					}
+					variant <- groups[[3]]
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end,variant=variant))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,end=end,
+							variant=variant))
+					}
+
+				} else if (type == "conversion") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)con(\\d+)_(\\d+)")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					tStart <- as.integer(groups[[3]])
+					tEnd <- as.integer(groups[[4]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end,
+							templateStart=tStart,templateEnd=tEnd))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,end=end,
+							templateStart=tStart,templateEnd=tEnd))
+					}
+
+				} else if (type == "delins") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)delins([ATCG]+)")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					variant <- groups[[3]]
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end,variant=variant))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,end=end,
+							variant=variant))
+					}
+
+				} else if (type == "amplification") {
+					groups <- extract.groups(body,"(\\d+)_(\\d+)\\[(\\d+)\\]")
+					start <- as.integer(groups[[1]])
+					end <- as.integer(groups[[2]])
+					copies <- as.integer(groups[[3]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,end=end,copies=copies))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,
+							start=start,end=end,copies=copies))
+					}
+
+				} else {
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,type="invalid"))
+					} else {
+						return(list(hgvs=s,subject=subject,type="invalid"))
+					}
+				}
+
+			})
+
+		} else if (subject=="coding") {
+			#coding needs to be handled separately from genomic, as the syntax may differ
+			#e.g. it allows for offset descriptions relative to exon-intron borders
+
+			types <- c(
+				substitution="\\d+([+-]\\d+)?[ACGT]>[ACGT]", 
+				singledeletion="^\\d+([+-]\\d+)?del$",
+				deletion="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?del$",
+				inversion="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?inv",
+				duplication="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?dup",
+				insertion="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?ins[ATCG]+",
+				conversion="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?con\\d+([+-]\\d+)?_\\d+([+-]\\d+)?",
+				delins="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?delins[ATCG]+",
+				amplification="\\d+([+-]\\d+)?_\\d+([+-]\\d+)?\\[\\d+\\]"
+			)
+			
+			phasing <- attr(subbodies,"multi")
+			isMulti <- length(subbodies) > 1
+			
+			lapply(1:length(subbodies), function(i.multi) {
+				body <- subbodies[[i.multi]]
+
+				type <- findType(body,types)
+
+				if (type == "substitution") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?([ACGT])>([ACGT])")[1,]
+					position <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					ancestral <- groups[[3]]
+					variant <- groups[[4]]
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+						type=type,start=position,startIntron=intronOffset,ancestral=ancestral,
+						variant=variant))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=position,
+						startIntron=intronOffset,ancestral=ancestral,variant=variant))
+					}
+
+				} else if (type == "singledeletion") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?del")[1,]
+					position <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=position,startIntron=intronOffset))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=position,
+							startIntron=intronOffset))
+					}
+				} else if (type == "deletion") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?del")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,
+							startIntron=intronOffset,end=end,endIntron=intronOffset2))
+					}
+				} else if (type == "inversion") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?inv")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,
+							startIntron=intronOffset,end=end,endIntron=intronOffset2))
+					}
+				} else if (type == "duplication") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?dup")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,
+							startIntron=intronOffset,end=end,endIntron=intronOffset2))
+					}
+				} else if (type == "insertion") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?ins([ATCG]+)")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					variant <- groups[[5]]
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2,variant=variant))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,
+							startIntron=intronOffset,end=end,endIntron=intronOffset2,variant=variant))
+					}
+				} else if (type == "conversion") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?con(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					tStart <- as.integer(groups[[5]])
+					intronOffset3 <- as.integer(groups[[6]])
+					tEnd <- as.integer(groups[[7]])
+					intronOffset4 <- as.integer(groups[[8]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2,templateStart=tStart,
+							templateStartIntron=intronOffset3,templateEnd=tEnd,
+							templateEndIntron=intronOffset4))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,
+							start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2,templateStart=tStart,
+							templateStartIntron=intronOffset3,templateEnd=tEnd,
+							templateEndIntron=intronOffset4))
+					}
+				} else if (type == "delins") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?delins([ATCG]+)")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					variant <- groups[[5]]
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2,variant=variant))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,
+							startIntron=intronOffset,end=end,endIntron=intronOffset2,variant=variant))
+					}
+				} else if (type == "amplification") {
+					groups <- extract.groups(body,"(\\d+)([+-]\\d+)?_(\\d+)([+-]\\d+)?\\[(\\d+)\\]")
+					start <- as.integer(groups[[1]])
+					intronOffset <- as.integer(groups[[2]])
+					end <- as.integer(groups[[3]])
+					intronOffset2 <- as.integer(groups[[4]])
+					copies <- as.integer(groups[[3]])
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=start,startIntron=intronOffset,
+							end=end,endIntron=intronOffset2,copies=copies))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=start,
+							startIntron=intronOffset,end=end,endIntron=intronOffset2,copies=copies))
+					}
+				} else {
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type="invalid"))
+					} else {
+						return(list(hgvs=s,subject=subject,type="invalid"))
+					}
+				}
+
+			})
+
+		} else if (subject=="protein") {
+
+			one2three <- c(A="Ala",C="Cys",D="Asp",E="Glu",F="Phe",G="Gly",H="His",
+				I="Ile",K="Lys",L="Leu",M="Met",N="Asn",P="Pro",Q="Gln",R="Arg",
+				S="Ser",T="Thr",V="Val",W="Trp",Y="Tyr",`*`="Ter")
+			three2one <- c(Ala="A",Arg="R",Asn="N",Asp="D",Cys="C",Gln="Q",Glu="E",
+				Gly="G",His="H",Ile="I",Leu="L",Lys="K",Met="M",Phe="F",Pro="P",
+				Ser="S",Thr="T",Trp="W",Tyr="Y",Val="V",Ter="*")
+			codes <- paste(c(one2three,three2one[-21],"\\*"),collapse="|")
+
+			types <- list(
+				synonymous1="^=$",
+				synonymous2=paste0("^(",codes,")(\\d+)=$"),
+				substitution=paste0("^(",codes,")(\\d+)(",codes,")$"),
+				singledeletion=paste0("^(",codes,")(\\d+)del$"),
+				deletion=paste0("^(",codes,")(\\d+)_(",codes,")(\\d+)del$"),
+				duplication=paste0("^(",codes,")(\\d+)_(",codes,")(\\d+)dup$"),
+				insertion=paste0("^(",codes,")(\\d+)_(",codes,")(\\d+)ins((",codes,")+)$"),
+				delins=paste0("^(",codes,")(\\d+)_(",codes,")(\\d+)delins((",codes,")+)$"),
+				frameshift1=paste0("^(",codes,")(\\d+)fs$"),
+				frameshift2=paste0("^(",codes,")(\\d+)(",codes,")fs(Ter|\\*)(\\d+)$")
+			)
+			
+			phasing <- attr(subbodies,"multi")
+			isMulti <- length(subbodies) > 1
+			
+			lapply(1:length(subbodies), function(i.multi) {
+				body <- subbodies[[i.multi]]
+
+			type <- findType(body,types)
+
+				if (type == "synonymous1") {
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,type=type))
+					} else {
+						return(list(hgvs=s,subject=subject,type="synonymous"))
+					}
+				} else if (type == "synonymous2") {
+					groups <- extract.groups(body,types$synonymous2)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					if (aa1 %in% c(one2three,three2one)) {
+						if (is.na(aacode)) {
+							#do nothing
+						} else if (aacode == 1) {
+							if (nchar(aa1) == 3) aa1 <- three2one[[aa1]]
+						} else if (aacode ==3) {
+							if (nchar(aa1) == 1) aa1 <- one2three[[aa1]]
+						} else {
+							#this should never happen, as it's supposed to be detected at start of function
+							stop("Invalid aacode. If you see this, report this as a bug!")
+						}
+						if (isMulti) {
+							return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+								type="synonymous",start=pos,ancestral=aa1))
+						} else {
+							return(list(hgvs=s,subject=subject,type="synonymous",start=pos,
+							ancestral=aa1))
+						}
+					} else {#not valid amino acid
+						if (isMulti) {
+							return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+								type="invalid"))
+						} else {
+							return(list(hgvs=s,subject=subject,type="invalid"))
+						}
+					}
+				} else if (type == "substitution") {
+					groups <- extract.groups(body,types$substitution)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					aa2 <- groups[[3]]
+					if (aa1 %in% c(one2three,three2one) && aa2 %in% c(one2three,three2one)) {
+						if (is.na(aacode)) {
+							#do nothing
+						} else if (aacode == 1) {
+							if (nchar(aa1) == 3) aa1 <- three2one[[aa1]]
+							if (nchar(aa2) == 3) aa2 <- three2one[[aa2]]
+						} else if (aacode ==3) {
+							if (nchar(aa1) == 1) aa1 <- one2three[[aa1]]
+							if (nchar(aa2) == 1) aa2 <- one2three[[aa2]]
+						} else {
+							#this should never happen, as it's supposed to be detected at start of function
+							stop("Invalid aacode. If you see this, report this as a bug!")
+						}
+						if (isMulti) {
+							return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+								type=type,start=pos,ancestral=aa1,variant=aa2))
+						} else {
+							return(list(hgvs=s,subject=subject,type=type,start=pos,
+							ancestral=aa1,variant=aa2))
+						}
+					} else {#not valid amino acid
+						if (isMulti) {
+							return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+								type="invalid"))
+						} else {
+							return(list(hgvs=s,subject=subject,type="invalid"))
+						}
+					}
+
+				} else if (type == "singledeletion") {
+					groups <- extract.groups(body,types$singledeletion)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					if (is.na(aacode)) {
+						#do nothing
+					} else if (aacode == 1) {
+						if (nchar(aa1) == 3) aa1 <- three2one[[aa1]]
+					} else if (aacode == 3) {
+						if (nchar(aa1) == 1) aa1 <- one2three[[aa1]]
+					} else {
+						#this should never happen, as it's supposed to be detected at start of function
+						stop("Invalid aacode. If you see this, report this as a bug!")
+					}
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=pos,ancestral=aa1))
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=pos,ancestral=aa1))
+					}
+				} else if (type == "deletion") {
+					groups <- extract.groups(body,types$deletion)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					aa2 <- groups[[3]]
+					pos2 <- as.integer(groups[[4]])
+					if (is.na(aacode)) {
+						#do nothing
+					} else if (aacode == 1) {
+						if (nchar(aa1) == 3) aa1 <- three2one[[aa1]]
+						if (nchar(aa2) == 3) aa2 <- three2one[[aa2]]
+					} else if (aacode == 3) {
+						if (nchar(aa1) == 1) aa1 <- one2three[[aa1]]
+						if (nchar(aa2) == 1) aa2 <- one2three[[aa2]]
+					} else {
+						#this should never happen, as it's supposed to be detected at start of function
+						stop("Invalid aacode. If you see this, report this as a bug!")
+					}
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=pos,ancestral=aa1,end=pos2,ancestral2=aa2))	
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=pos,
+							ancestral=aa1,end=pos2,ancestral2=aa2))	
+					}
+
+				} else if (type == "duplication") {
+					groups <- extract.groups(body,types$duplication)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					aa2 <- groups[[3]]
+					pos2 <- as.integer(groups[[4]])
+					if (is.na(aacode)) {
+						#do nothing
+					} else if (aacode == 1) {
+						if (nchar(aa1) == 3) aa1 <- three2one[[aa1]]
+						if (nchar(aa2) == 3) aa2 <- three2one[[aa2]]
+					} else if (aacode == 3) {
+						if (nchar(aa1) == 1) aa1 <- one2three[[aa1]]
+						if (nchar(aa2) == 1) aa2 <- one2three[[aa2]]
+					} else {
+						#this should never happen, as it's supposed to be detected at start of function
+						stop("Invalid aacode. If you see this, report this as a bug!")
+					}
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=pos,ancestral=aa1,end=pos2,ancestral2=aa2))	
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=pos,
+							ancestral=aa1,end=pos2,ancestral2=aa2))	
+					}
+
+				} else if (type == "insertion") {
+					groups <- extract.groups(body,types$insertion)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					aa2 <- groups[[3]]
+					pos2 <- as.integer(groups[[4]])
+					insert <- groups[[5]]
+					#TODO: Implement code conversion 
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=pos,ancestral=aa1,end=pos2,ancestral2=aa2,variant=insert))	
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=pos,
+							ancestral=aa1,end=pos2,ancestral2=aa2,variant=insert))	
+					}
+
+				} else if (type == "delins") {
+					groups <- extract.groups(body,types$delins)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					aa2 <- groups[[3]]
+					pos2 <- as.integer(groups[[4]])
+					insert <- groups[[5]]
+					#TODO: Implement code conversion 
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type=type,start=pos,ancestral=aa1,end=pos2,ancestral2=aa2,variant=insert))	
+					} else {
+						return(list(hgvs=s,subject=subject,type=type,start=pos,
+							ancestral=aa1,end=pos2,ancestral2=aa2,variant=insert))	
+					}
+
+				} else if (type == "frameshift1") {
+					groups <- extract.groups(body,types$frameshift1)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					#TODO: Implement code conversion 
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type="frameshift",start=pos,ancestral=aa1))
+					} else {
+						return(list(hgvs=s,subject=subject,type="frameshift",start=pos,
+							ancestral=aa1))
+					}
+
+				} else if (type == "frameshift2") {
+					groups <- extract.groups(body,types$frameshift2)
+					aa1 <- groups[[1]]
+					pos <- as.integer(groups[[2]])
+					aa2 <- groups[[3]]
+					term <- as.integer(groups[[5]])
+					#TODO: Implement code conversion 
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type="frameshift",start=pos,ancestral=aa1,variant=aa2,end=term))
+					} else {
+						return(list(hgvs=s,subject=subject,type="frameshift",start=pos,
+							ancestral=aa1,variant=aa2,end=term))
+					}
+
+				} else {#unmatched type
+					if (isMulti) {
+						return(list(hgvs=s,subject=subject,phasing=phasing,multiPart=i.multi,
+							type="invalid"))
+					} else {
+						return(list(hgvs=s,subject=subject,type="invalid"))
+					}
+				}
+
+			})
+
+		} else if (subject=="noncoding") {
+			#FIXME: These need to be list of lists to match postprocessing
+			return(list(list(hgvs=s,subject="not_implemented",type="not_implemented")))
+		} else if (subject=="mitochondrial") {
+			return(list(list(hgvs=s,subject="not_implemented",type="not_implemented")))
+		} else if (subject=="rna") {
+			return(list(list(hgvs=s,subject="not_implemented",type="not_implemented")))
+		} else {#unmatched subject, shouldn't happen
+			stop("Unmatched subject! If you see this, report it as a bug!")
+		}
+	})
+
+	#demote multimutants to enforce simple list structure
+	multiLengths <- sapply(out,length)
+	ids <- do.call(c,lapply(1:length(multiLengths),
+		function(i) if (multiLengths[[i]]==1) as.character(i) else paste0(i,".",1:multiLengths[[i]])
+	))
+	out2 <- do.call(c,out)
+	names(out2) <- ids
+
+
+
+	to.df(out2)
+}
\ No newline at end of file
diff --git a/tools/hgvsparser/test-data/inputBuilder.csv b/tools/hgvsparser/test-data/inputBuilder.csv
new file mode 100644
index 00000000000..de5ccbe9c5b
--- /dev/null
+++ b/tools/hgvsparser/test-data/inputBuilder.csv
@@ -0,0 +1,6 @@
+"hgvs","subject","type","start","ancestral","variant"
+"p.Ala105*","protein","substitution",105,"Ala","*"
+"p.Ala105*","protein","substitution",105,"Ala","*"
+"p.Ala105Arg","protein","substitution",105,"Ala","Arg"
+"p.Ala105Arg","protein","substitution",105,"Ala","Arg"
+"p.Ala105Asn","protein","substitution",105,"Ala","Asn"
diff --git a/tools/hgvsparser/test-data/inputParser.csv b/tools/hgvsparser/test-data/inputParser.csv
new file mode 100644
index 00000000000..79c2f2cf69c
--- /dev/null
+++ b/tools/hgvsparser/test-data/inputParser.csv
@@ -0,0 +1,6 @@
+accession,hgvs_nt,hgvs_splice,hgvs_pro,score,average,library,AA,p_AA
+urn:mavedb:00000044-a-1#4199,NA,NA,p.Ala105*,NA,NA,1,A435,p.A435
+urn:mavedb:00000044-a-1#4200,NA,NA,p.Ala105*,NA,NA,2,A435,p.A435
+urn:mavedb:00000044-a-1#4187,NA,NA,p.Ala105Arg,-2.71,-2.76,1,A435R,p.A435R
+urn:mavedb:00000044-a-1#4188,NA,NA,p.Ala105Arg,-2.81,-2.76,2,A435R,p.A435R
+urn:mavedb:00000044-a-1#4181,NA,NA,p.Ala105Asn,-1.1,-1.13,1,A435N,p.A435N