This module defines concrete subclasses for the abstract character matrix components that all character matrices must implement. The subclasses defined here apply to "standard" categorical character data, such as counts of morpholical features. In a verbose notation, this data is represented as the "state" attribute of the <cell> element. In a compact notation, the same data is represented as a sequence of space-separated integers. A standard character ambiguity mapping. This is a concrete implementation of the state element, which requires a symbol element, in this case restricted to integers, and optional mapping elements to refer to other states. The AbstractState type is the superclass for a state definition. The element encloses a required AbstractSymbol element that in restricted concrete subclasses must be of a sensible type such as a single IUPAC character. It may enclose zero or more AbstractMapping elements to resolve ambiguities. The AbstractState type is the superclass for a state definition. The element encloses a required AbstractSymbol element that in restricted concrete subclasses must be of a sensible type such as a single IUPAC character. It may enclose zero or more AbstractMapping elements to resolve ambiguities. A container for a set of states. A concrete implementation of the char element, which requires a states attribute to refer to a set of defined states The StandardFormat class is the container of standard column definitions. This is a single cell in a matrix containing a standard observation. This is a simple type that specifies a sequence of standard characters. This is a row in a matrix of standard data as character sequences. This is a row in a matrix of standard data as granular obervations. A matrix of rows with seq strings of type standard. A matrix of rows with single character observations. A standard characters block consisting of sequences preceded by metadata. A standard characters block consisting of granular cells preceded by metadata.