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Element:or
Attributes:class | definitionURL | encoding | id | other | style | xlink:href | xref |
Parents:apply | bvar | condition | declare | degree | domainofapplication | fn | interval | lambda | list | logbase | lowlimit | matrix | matrixrow | momentabout | otherwise | piece | reln | semantics | set | uplimit | vector |

Examples:

XHTML documentMathML Source
Example from standard
<apply>
     <or/>
     <ci> a </ci>
     <ci> b </ci>
</apply>