This module defines concrete subclasses for the abstract character matrix components that all character matrices must implement. The subclasses defined here apply to amino acid character data. In a verbose notation, this data is represented as the "state" attribute of the <cell> element, whose value-space is limited to the IUPAC single character nucleotide symbols. In a compact notation, the same data is represented as a sequence of tokens (whitespace is allowed but has no meaning). The AAToken simple type is a restriction of AbstractSymbol that defines an IUPAC single character amino acid symbol. AminoAcid A concrete implementation of the AbstractChar element. In this implementation there is no reference to explicitly defined states, as we use the IUPAC standard. There must be an identifier ("id") that is of type xs:nonNegativeInteger to define the column number. Amino_Acid_Character The AAFormat class is the container of amino acid column definitions. This is a single cell in a matrix containing an amino acid observation. Amino_Acid_State_Datum This is a simple type that specifies a sequence of amino acid characters, following IUPAC single character symbols for aa (and ambiguities). This is a row in a matrix of amino acid data containing raw sequence data. This is a row in a matrix of amino acid data containing granular observations. A matrix of rows with amino acid data as sequence strings. A matrix of rows with single character observations. An amino acid characters block consisting of sequences preceded by metadata. An amino acid characters block consisting of granular cells preceded by metadata.