The Art & Rare Materials BIBFRAME Ontology Extension (originally two projects: ArtFrame and the Rare Materials Ontology Extension) is a product of the LD4P grant; however, LD4L Labs contributed effort to the project in three crucial ways: ontology expertise, application profile development and VitroLib customization.

Ontology Expertise:

• The ARM project benefited from great collaboration between communities of practice (e.g.: RBMS' Bibliographic Standards Committee and ARLIS' Cataloging Advisory Committee) and LD4P institutions, the group lacked enough colleagues with ontology expertise to enable the scale of work expected of the project. As such, LD4L Labs' colleague Rebecca Younes joined the ARM team. Rebecca led some of the subgroup efforts within the ARM project, including but not limited to modeling for custodial history as well as the attributions subgroup. Additionally, her expertise was critical in training subject domain experts in data modeling. Without this additional support from LD4L Labs, the ARM project would have accomplished less modeling. Finally, the versioning process for terms in the ontology derives from the work done under LD4L Labs' supported bibliotek-o effort.

Application Profile Development:

• LD4L Labs' support for ARM enabled the group to scale application profile development (in SHACL) beyond initial expectations. Through this engagement, the ARM team developed SHACL for validation shapes, in addition to display shapes, within the rare monograph application profile. More on the validation shapes is available in the SHACL maintenance document in the ARM GitHub.

VitroLib Customization:

• In order to test ARM, catalogers needed to engage with the model through an editing environment, in this case The VitroLib Metadata Editor. The effort devoted to building the SHACL-to-VitroLib transform was extended to meet the need of implementing ARM in VitroLib alongside considerable effort to build custom forms that facilitate cataloging in complex models.