OOXMLcompliant

OOXMLcompliant describes software, libraries, or document-processing workflows that conform to the Office Open XML (OOXML) specification. OOXML is a family of open, XML-based formats used to store word processing documents, spreadsheets, and presentations. The formats are most commonly associated with Microsoft Office, but have been standardized for interoperability.

Standards and versions: OOXML was published by Ecma International as ECMA-376 and later standardized by ISO/IEC as 29500. The ISO standard includes the Open Packaging Conventions and the markup schemes for documents, scripts, and relationships. In practice, providers may implement OOXML in two conformance modes: Transitional and Strict; Strict aligns with the ISO/IEC 29500:2012 revision; Transitional allows some legacy features from older forms.

Conformance and testing: Being OOXMLcompliant typically requires passing conformance test suites and interoperability tests, showing ability to read and write files that conform to the official schemas, and proper handling of packaging, relationships, and parts. Many vendors publicize compliance certification or claim broad compatibility with Microsoft Office formats.

Limitations: Even with conformance, real-world interchange can vary due to optional features, extensions, or differences in rendering; some complex features may be implemented differently, so round-trip fidelity across applications is not guaranteed.

For further context, see Office Open XML, ISO/IEC 29500 and ECMA-376.

---