This module defines concrete subclasses for the abstract character matrix components that all character matrices must implement. The subclasses defined here apply to restriction site data. In a verbose notation, this data is represented as the "state" attribute of the <cell> element, whose value-space is limited to 0 or 1. In a compact notation, the same data is represented as a sequence of tokens (whitespace is allowed but has no meaning). A concrete implementation of the char element, which only requires a unique identifier. The RestrictionFormat class is the container of restriction column definitions. This is a single cell in a matrix containing a restriction site observation. This is a simple type that specifies a sequence of restriction site characters. This is a row in a matrix of restriction site data as character sequences. This is a row in a matrix of restriction site data as granular obervations. A matrix of rows with seq strings of type restriction. A matrix of rows with single character observations. A restriction site characters block consisting of sequences preceded by metadata. A standard characters block consisting of granular cells preceded by metadata.