Organological databases and repositories: a critical source catalogue

A critical source study, annotated catalogue and companion structural atlas of the resources selected by MODAVIS Aggregator. The fixed selection frame comprises 53 registered source keys, five constituent score collections and three audit-only resources; these are not 61 independent databases.

The study examines documentary units, historical configurations, source dependence, editorial responsibility, maintenance, citation and reported rights statements. Portal accounts and selected-document observations are dated 10-11 September 2026. The study retains its 111-reference bibliography and dated evidence register.

The companion Source structure and extraction atlas gives every catalogue entry a consistent eight-part chapter: identity and scope; native contents; discovery and acquisition; extraction and normalization; dates and relationships; preservation and loss; implementation evidence; research use, citation and rights. Its machine-readable companion records source-specific readings, effective parser inheritance, inspected expressions, bounded code excerpts, revision identifiers, file hashes and line locators. Shared normalizers and selected offline helpers are indexed separately. The atlas has a linked bibliography of 152 references and is supplied as PDF, Markdown and JSON, with a CSL bibliography.

Third-party scores, recordings, images and forum texts are not redistributed. The CC0 dedication covers the original compilation only; rights in cited material and limited quotations are unaffected. This record remains an unpublished draft.