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| Related Syntax | Related Concepts | ||||||||
| built-in variable | data-attributes | ||||||||
Purpose
Allows all declared attributes of entities named in an entity or entities attribute of an element to be treated as a shelf (to a certain extent), as follows:
The key value used to index data-attributes should always be uppercased when SGML parsing is involved and when the SGML declaration specifies NAMECASE GENERAL YES for the SGML document being processed. Unlike names in OmniMark programs, string values used as keys are not automatically uppercased - - doing so is the OmniMark programmer's responsibility. Uppercasing can be done by directly entering the appropriately uppercased values or by using the u format modifier.
The data-attributes shelf differs from other shelves in not having a current item. In addition, even though some of the items on the data-attributes shelf may be list-valued, "double-indexing" is not allowed. The using prefix can be used to accomplish double-indexing.
To reference the attributes of a specific entity named in an entity or entities attribute, the data-attributes shelf can be qualified in the same ways as data-attribute references.
The data-attributes shelf is indexed as follows:
specified qualifier is not given
specified qualifier is given
The following illustrations how a repeat over can be used to iterate over the data-attributes shelf:
repeat over specified data-attributes of (attribute ref) as this-one
output key of data-attribute this-one
output "='%v(this-one)'%n"
again
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Related Syntax attributes data-attribute |
Related Concepts Attribute aliases Attributes: order of indexing |
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