\name{asGFF} \alias{asGFF} \alias{asGFF,GRangesList-method} \title{Coerce to GFF structure} \description{ Coerce the structure of an object to one following GFF-like conventions, i.e., using the \code{Parent} GFF3 attribute to encode the hierarchical structure. This object is then suitable for export as GFF3. } \usage{ asGFF(x, ...) \S4method{asGFF}{GRangesList}(x, parentType = "mRNA", childType = "exon") } \arguments{ \item{x}{ Generally, a tabular object to structure as GFF(3) } \item{parentType}{The value to store in the \code{type} column for the top-level (e.g., transcript) ranges. } \item{childType}{The value to store in the \code{type} column for the child (e.g., exon) ranges. } \item{\dots}{ Arguments to pass to methods } } \value{ For the \code{GRangesList} method: A \code{GRanges}, with the columns: \code{ID} (unique identifier), \code{Name} (from \code{names(x)}, and the names on each element of \code{x}, if any), \code{type} (as given by \code{parentType} and \code{childType}), and \code{Parent} (to relate each child range to its parent at the top-level). } \author{ Michael Lawrence } \examples{ \dontrun{ library(TxDb.Hsapiens.UCSC.hg19.knownGene) exons <- exonsBy(TxDb_Hsapiens_UCSC_hg19_knownGene) values(asGFF(exons)) } }