===Plant picture===
[[File:UDOM_PlantPartsIL_DOM_001.png|thumb|220px|alt=Parts of a plant|Example plant and parts]]
Lets start with a simple picture and assume that our plant consists of a pump and an armature. Both equipments exhibit certain technical or other properties, which our datamodel must contain in some form. Additionally the datamodel has to provide mechanism to indicate the circumstances that both equipments are parts of the plant and maybe even be related to each other.
In this first exemplary plant, we take account of a pump and armature and find definitions as shown in the picture on the right. Looking closer at the ''PUMP'' block reveals its properties and property values, this information is explicitely depicted as
[[File:IL_DOM_001IL_DOM_002.png|500 px|alt=''PUMP'' block details|''PUMP'' block details]]
Of course, a real plant consists of multiple pumps, each described with the same set of properties (TAG, vendor, power, maintenance data). The real pumps in the plant are distinguished by different property values as given in the table.