This documentum tests based on XML Schema Part 0: Primer Second Edition, 2.3 Simple Types and Appendix B XML Schema Part 2: Datatypes Second Edition 3 Built-in Datatypes For WhiteSpace see XML Schema Part 2: Datatypes Second Edition 4.3.6 i.e http://www.w3.org/TR/2004/REC-xmlschema-2-20041028/datatypes.html#rf-whiteSpace and ETSI ES 201 873-9 V4.1.2 / Ch 6.1.5