<table>
<tr>
<td>[[File:UDOM_Relating1.png|400 px|alt="Relation pump and plant"]]</td>
<td> [[File:ArrowGreenRight.png|20 px]] </td>
<td>
;UBIK metamodel: Data model built and described by metaclasses and metaproperties related to each other, either by <b>1 : n</b> or <b>n : n</b> cardinality.
</div>
===Entity Relationship Model (ER model)===