4.2.6 Material Association

Any product or product type can have associated materials indicating the physical composition of an object.

Materials can have representations for surface styles indicating colors, textures, and light reflectance for 3D rendering. Materials can have representations for fill styles indicating colors, tiles, and hatch patterns for 2D rendering. Materials can have properties such as density, elasticity, thermal resistance, and others as defined in this specification. Materials can also be classified according to a referenced industry standard.

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcObjectDefinition IfcObjectDefinition 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] IfcRelAssociatesMaterial IfcRelAssociatesMaterial 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1] 5. RelatedObjects [1:?] 6. RelatingMaterial [1:1] IfcObjectDefinition:HasAssociations1->IfcRelAssociatesMaterial:RelatedObjects0
Figure 4.2.6.A

General Usage

Table 4.2.6.B