Homosaurus is an innovative, international linked data vocabulary dedicated to LGBTQ+ terminology designed to enhance the discoverability of resources within this community. Originally created in 1997 by IHLIA LGBT Heritage, the platform aimed to categorize gay and lesbian literature, evolving significantly to include broader concepts related to bisexuality, gender, and intersex identities. The current version, released in 2019, is a hierarchical thesaurus that supports LGBTQ+ archives, libraries, and documentation centers worldwide.

Homosaurus serves as a vital tool for organizations to improve resource classification, aiding users in accessing LGBTQ+-specific materials alongside traditional catalogs such as the Library of Congress Subject Headings. The project is governed by a collaborative Editorial Board comprising experts in archival studies, digital humanities, and social justice, ensuring continual updates and public outreach. Through ongoing revisions and expansion, Homosaurus remains a critical resource for fostering inclusivity and enhancing research in LGBTQ+ history and culture, supporting the voices and identities of marginalized communities globally.