# Logical Record Architecture for Health and Social Care
## Discharge Summary Release 0.02

Contents
The content of this release is not comprehensive and is not fully validated and must not be used in live system implementations.
# Reference Model Class: MATERIAL_ACTIVITY_ELEMENT
The MATERIAL_ACTIVITY_ELEMENT class is an ACTIVITY_ELEMENT whose coded meaning is constrained to represent a SNOMED CT procedure situation involving the administration of a product or substance or the provision of a material entity to a subject. Instances of material entity (including products and subsatnces) are represented by the MATERIAL_ENTITY_ELEMENT. The value attribute is constrained to the null flavor NA | not applicable | so as to prohibit its use within the LRA whilst maintaining conformance to EN 13606-1:2007. ## Specializes ## ACTIVITY_ELEMENT ## Constraints
Type | Name | Specification
--- | --- | ---
meaning is a substance procedure | LRA Invariant | inv: meaning.code.semantic(LraSubstanceActivityElementMeaning)
name value | LRA Inv: Fixed | inv: name.value = <a href="$element://{99CDF407-1579-4eac-BB4F-F9D25CB6AA56}"><font color="#0000ff"><u>LraRecordComponentName</u></font></a>.MATERIAL_ACTIVITY_ELEMENT