SACM — SAEM: Page 35, section 11

Rather than trying to enumerate all the possible properties that evidence could possess, it may be better to consider a extensible mechanism such as the TaggedValue class in ARM. This principle would simplify the model considerably if applied to all such properties, by the time Provenance, TimingProperty, CustodyProperty, EvidenceProperty and DocumentProperty sub-classes have been taken into account. Detailed enumerations such as these are bound to be incomplete; user defined values are more flexible.

This has been already resolved through related issues 16730, 16731, 16736, 16773,
16740, 16756, 16760 and 16845 to the extent consistent with the intent of the Evidence
Metamodel to provide a structured an well-defined (interoperable) way of constructing
and exchanging statements related to evidence.
Disposition: Duplicate