Birgit Boss

Add data type "DateTimeUtc"

2

closes #498 + bugfix negative integer example

use idShort instead of index in idShortPath for elements of SML

1

**Is your feature request related to a problem? Please describe.** In https://github.com/admin-shell-io/aas-specs/issues/432 it was discussed to also allow idShort for elements within a SubmodelElementList. AASd-120 was removed that retricted that...

**Is your feature request related to a problem? Please describe.** it is not really possible to check the following constraints: `Constraint AASd-006: If both, the value and the valueId of...

**Is your feature request related to a problem? Please describe.** Clarify if it is `(GlobalReference)0173-1#02-BAA120#008 (FragmentReference)0173-1#02-BAA144#008` or `(GlobalReference)0173-1#02-BAA120#008/0173-1#02-BAA144#008` **Describe the solution you'd like** References keys were introduced to be able...

AdministrativeInformation: add createdAt and updatedAt attributes

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**Is your feature request related to a problem? Please describe.** There are requirements requesting search capabilities via date or date ranges an AAS or Submodel was created, see for example...

Requirements Mapping probably not needed any longer, just interesting for historical reasons. In future compliance to IEC63278 will be explained.

AssetKind: add Batch besides Type and Instance?

7

**Is your feature request related to a problem? Please describe.** In[ Digital Product Passport ESPR t](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=OJ:L_202401781)here is a distinction between - model = Type - item = Instance and -...

closes #484 only changelog needed to be updated, the changes themselves are contained in https://github.com/admin-shell-io/aas-specs-metamodel/pull/640

This PR was open before we decided to make a bugfix release 3.1.2. Therefore this PR is to get the state as before, only with adding 3.1.2 and splitting changelog...

- editoral changes - fix references