{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/recursion-in-rdf-data-shape-languages","title":"Recursion in RDF Data Shape Languages","arxiv_id":"1505.04972","date":"2015-05-19","proceeding":null,"authors":["Arthur Ryman"],"abstract":"An RDF data shape is a description of the expected contents of an RDF\ndocument (aka graph) or dataset. A major part of this description is the set of\nconstraints that the document or dataset is required to satisfy. W3C recently\n(2014) chartered the RDF Data Shapes Working Group to define SHACL, a standard\nRDF data shape language. We refer to the ability to name and reference shape\nlanguage elements as recursion. This article provides a precise definition of\nthe meaning of recursion as used in Resource Shape 2.0. The definition of\nrecursion presented in this article is largely independent of language-specific\ndetails. We speculate that it also applies to ShEx and to all three of the\ncurrent proposals for SHACL. In particular, recursion is not permitted in the\nSHACL-SPARQL proposal, but we conjecture that recursion could be added by using\nthe definition proposed here as a top-level control structure.","url_abs":"http://arxiv.org/abs/1505.04972v2","url_pdf":"http://arxiv.org/pdf/1505.04972v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"abstracts"},"code_links":[{"paper_slug":"recursion-in-rdf-data-shape-languages","repo_url":"https://github.com/agryman/shape-recursion","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}