2.2.10 Numbering Definition Extensions

The abstractNum element specified in [ISO/IEC29500-1:2016] section 17.9.1 is extended by the addition of the restartNumberingAfterBreak attribute (section 2.5.2.1).<9> To maintain compatibility with ISO/IEC-29500 implementations, the prefix of the attribute namespace MUST be specified in an Ignorable attribute ([ISO/IEC29500-3:2015] section 7.2).