This presentation provides a detailed description of ontology development efforts undertaken by Linked Data for Libraries Labs and Linked Data for Production partners to extend BIBFRAME 2.0 and enhance with alternative models, which have yielded the bibliotek-o framework (available: bibliotek-o GitHub Repository and bibliotek-o website). The framework includes the bibliotek-o ontology alongside well-established ontologies, building off BIBFRAME as its core. We are not creating a competitor to BIBFRAME; instead, our intention is to demonstrate select alternative models for consideration by the community and BIBFRAME architects as development continues in future versions of BIBFRAME. We will discuss motivations and focus on bibliotek-o modeling patterns, notably areas of deviation from BIBFRAME; in doing so, we will demonstrate how we believe that these models provide queryable patterns and align with ontology principles and best practices. Further, we will discuss efforts around development of an application profile and MARC-to-bibliotek-o mapping for use in aligned, in-development tooling for metadata production and conversion of legacy data. Our goal is to promote open development of bibliotek-o, including community engagement, feedback, collaboration, testing and adoption. To encourage engagement with the SWIB community, we will provide pointers to the various types of bibliotek-o documentation that are available and outline our strategy to engage with the community. With greater participation from the community we can hopefully begin to converge around a shared set of practices with a clear process for iterative improvements.