3. Content Rule
( value + )
<add-value> is used to specify values added to the attribute specified in the enclosing <modify-attr>.
A driver should gracefully ignore an <add-value> for a value that already exists and continue to process the remainder of the enclosing <modify>.
Example
See <modify>
- value
- The attribute value.
( value + )
- modify-attr
- Modify attribute.
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