This module defines concrete subclasses for the abstract character matrix components that all character matrices must implement. The subclasses defined here apply to RNA 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 (except T). In a compact notation, the same data is represented as a sequence of tokens (whitespace is allowed but has no meaning). The RNAToken simple type is a restriction of AbstractSymbol that defines a token of a IUPAC single character nucleotide token. 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 may be a CodonPosition ("codon") attribute, and there must be an identifier ("id") that is of type xs:nonNegativeInteger to define the column number. The RNAFormat class is the container of RNA column definitions. This is a single cell in a matrix containing a nucleotide observation. This is a simple type that specifies a sequence of RNA characters, following IUPAC single character symbols for nucleotides (and ambiguities). This is a row in a matrix of RNA data containing raw sequence data. This is a row in a matrix of RNA data containing granular observations. A matrix of rows with seq strings of type RNA. A matrix of rows with single character observations. A RNA characters block consisting of sequences preceded by metadata. A RNA characters block consisting of granular cells preceded by metadata.