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INCITS/ISO/IEC 13250-4:2009 (R2019)
Information technology - Topic Maps - Part 4: Canonicalization
ISO/IEC 13250-4:2009 defines a format known as Canonical XTM, or CXTM for short. The format is an XML format, and has the property that it guarantees that two equivalent Topic Maps Data Model instances (ISO/IEC 13250-2) will always produce byte-by-byte identical serializations, and that non-equivalent instances will always produce different serializations. CXTM thus enables direct comparison of two topic maps to determine equality by comparison of their canonical serializations.
InterNational Committee for Information Technology Standards [incits]