XOL meta model (cont’d)

• class ? slot ? individual

<individual>

<name> upper_bolt </name>

<type> part </type>

<slot-values>

<name> part-id </name>

<value> 2003014 </value>

</slot-values>

</individual>

• Problem: “semantics” of the ontology, e.g. constraints (domain, uniqueness, mandatory, …) not enforced by XML parser… of course...

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