<StandardNumber> (Standard Number)

This element specifies the standard number, such as ISBN or ISSN, of a source.
example: :
… 
  <b:NumberVolumes>10</b:NumberVolumes>
  <b:StandardNumber>ISBN or ISSN</b:StandardNumber>
  <b:Comments>Comments</b:Comments>
</b:Source>

The possible values for this element are defined by the ST_String255 simple type (§7.6.3.2).

Parent Elements

<Source> (§7.6.2.59)