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 which references an explicit state definition. 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. An IUPAC RNA ambiguity mapping. This is a concrete implementation of the state element, which requires a symbol attribute, in this case restricted to RNAToken, i.e. a single IUPAC nucleotide symbol, and optional mapping elements to refer to other states. The RNAUncertainStateSet describes a single uncertain IUPAC ambiguity mapping. The RNAPolymorphicStateSet describes a single polymorphic IUPAC ambiguity mapping. A container for a set of states. A concrete implementation of the AbstractChar element, i.e. a single column in an alignment. The RNAFormat class is the container of RNA column definitions. This is a single cell in a matrix containing an RNA 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.