1.1.106b Object within a Context Higgins Entity 1 Entity Relation A directed relation of an unspecified nature between two Entities. context relation A directed relation between two Contexts entity id Relative Entity UDI relative entity UDI Entity identifier (within some Context). Value is a RelativeEntityUDI context id Context UDI context UDI Context Identifier. Its value is a Context UDI string. relative attribute UDI Relative attribute UDI absolute attribute UDI Absolute Attribute UDI