# 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_ENTITY_ELEMENT
The MATERIAL_ENTITY_ELEMENT class is a BOUND_DATA_ELEMENT whose coded meaning is constrained to represent a physical entity (i.e. an independent physical continuant) that is either a: therapeutic pharmaceutical or biologic product; substance of relevance to health and social care, including active ingredients of drugs and medicaments, biological and dietary substances and allergens; specimen; or device, e.g. durable equipment, implantable devices, disposable supplies, etc. The value attribute is redefined to represent the amount of the material entity present within a mixture or compound regardless of any amount administered or supplied. ## Specializes ## BOUND_DATA_ELEMENT ## Constraints
Type | Name | Specification
--- | --- | ---
meaning is a material | LRA Invariant | --The meaning.code conforms to the specified semantic constraint. inv: meaning.code.semantic(LraMaterialElementMeaning)
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_ENTITY_ELEMENT
obs_time is undefined in LRA | LRA Invariant | inv: obs_time.oclIsUndefined()
value is type QTY | LRA Invariant | --The value of attribute value of type QTY inv: value.oclIsKindOf(QTY)