'This Song is Everybody’s' is a digital research and cataloguing environment edited by Nikos Ordoulidis, designed to showcase the power of the ReasonableGraph platform by mapping the vast, transcultural journey of a single shared musical and poetic corpus across the Eastern Mediterranean, the Balkans, the Middle East, and beyond. Taking historic audio recordings as its primary point of departure, the project uses the IFLA LRM model to structure an intricate data network that transcends traditional national music historiographies.

Rather than following a rigid, linear narrative, the platform invites users on an exploratory journey through 114 interlinked entities, demonstrating how disparate archival fragments can be organically connected. Within this single case study, users can discover and cross-examine:

• 32 Person Authorities encompassing historical composers, traditional informants, legendary performers (such as Roza Eskenazi and Safiye Aylâ), and modern scholars.
• 17 Geographic Places mapping out cities of recording, publication, and origin—from Athens, Istanbul, and Cairo to New York, Leipzig, and Kolkata.
• 11 Historical Expressions & Recordings spanning acoustic 78 rpm shellac discs, early electric recordings, and vinyl media, alongside 13 Physical Manifestations and 21 Digital Artifacts (including scanned record labels, rare photographs, and digital scores).
• 5 Major Record Companies & Archives (such as The Gramophone Company, Victor, and the Kounadis Family Archive) that acted as the channels of transmission.

By carefully delineating complex relationships—such as distinguishing shared poetic matrices (like the verses documented by Arnold Passow in 1860) from distinct modal and melodic realities (such as Hitzaz/Hitzaskiar)—the project illustrates how ReasonableGraph turns complex bibliographic and semantic metadata into an intuitive, pragmatic tool for cultural musicologists, ethnomusicologists, and digital humanists eager to uncover the hidden webs binding global musical repertoires together.

Note: All audio files, labels, and visual media utilised within this pilot demonstration have been borrowed from external digital archives—duly attributed within their respective item records—for educational purposes, aiming to showcase the capabilities of modern semantic web technologies.