ANSI/NISO Z39.102-2022

9 ANSI/NISO Z39.102-2022 STS (Version 1.2) • 9.2 Attributes

9.2.39 @custom-type Custom Attribute Value Escape Hatch

Used in the same attribute list as an attribute with a set list of values, to provide a way for the content creator to say my attribute value is not on the set list.

In elements <boxed-text>, <fig>, <graphic>, <media>, <person-group>, <preformat>, <pub-id>, <related-term>, <std>, <std-ref>, <table-wrap>, and <xref>, this attribute may be used if the element is used.
Value Meaning
Text, numbers, or special characters The value of the type attribute for this element, when that value is not found in a set list of values.