SequenceML deals with all kinds of simple sequence information often used as input for several common bioinformatics tools. It is designed to be used as a replacement for the FASTA format, containing all of FASTA's information content while avoiding that format's aforementioned consistency problems. SequenceML differentiates between nucleic- and aminoacid sequences following the IUPAC standard and also allows the user to add free sequence information based on basic types defined by BioTypes. SequenceML also supports a mandatory sequence id and an optional detailed sequence description. SequenceML does not contain any annotation information (for this application, see SequenceAnnotationML. Synonyms for this element