Target namespace: http://schemas.microsoft.com/office/word/2010/wordml

An ST_LongHexNumber (as specified by [ISO/IEC29500-1:2012] section 17.18.50) attribute that specifies an identifier for the element this attribute is applied to. Values MUST be greater than 0 and less than 0x80000000. See section 2.2.6 for how this attribute integrates with ISO/IEC-29500-1.

The following W3C XML Schema ([XMLSCHEMA1] section 2.1) fragment specifies the contents of this attribute.

 <xsd:attribute name="anchorId" type="w:ST_LongHexNumber"/>

See section 5.1 for the full W3C XML Schema ([XMLSCHEMA1] section 2.1).