+ The Shapes Constraint Language, "SHACL", is a language for validating RDF graphs against a set + of conditions. SHACL has a core specification, extensions for related query languages, User Interface + generation, rule-based reasoning and a data profiling mechanism. This document overviews all these + parts of SHACL and serves as an introduction to all of them and related on-going work such as libraries + of examples. +
++ This documentation is published by the Data Shapes Working Group. +
++ This document provides a non-normative, high-level, overview of the various Shapes Constraint Language (SHACL) specifications. +
++ The second iteration of the World Wide Web Consortium's Data Shapes Working Group aimed to "...update data shapes standards in line with the versions of core Semantic Web standards that cater for RDF-star and to extend the applications of data shapes with new packaging and use specifications". The outcome of the Working Group's operations was a set of specifications - W3C 'Recommendations' - that cover core SHACL elements, extended elements for advanced validation and SHACL functions beyond validation, such as User Interface generation. +
++ The What's new in SHACL 1.2 section below describes the changes between SHACL, as published in 2017 and SHACL 1.2, including all the new SHACL elements such as SHACL for User Interface generation. +
++ The Specifications section below lists all the Data Shapes Working Group's specifications which are also listed in each specification's Introduction. +
++ The appendixes below contain material supporting the set of SHACL specifications and provide SHACL users with additional support, such as validators for shapes graphs. +
++ The main information about SHACL 1.0 → 1.2 will be added here. +
++ SHACL 1.0 Core included an appendix providing a shapes graph to be used to validate shapes graphs according to the SHACL 1.0 Core specification. SHACL 1.2 has moved this information from the Core specification to an appendix in this Overview to allow for information relevant to parts of SHACL 1.2 not in the Core. A note about this new SHACL-SHACL location is retained in SHACL 1.2 Core. +
+The original SHACL specifications, now deprecated in favour of SHACL 1.2 specifications, above.
+TODO: This section will describe...
+TODO: This section will describe the governance arrangements in place for the continued maintenance of SHACL-SHACL resources, i.e., handling updates beyond the time frame of the Working Group's Charter.
++ The Data Shapes Working Group maintains SHACL graphs that can be used to validate other SHACL Shapes graphs, called "SHACL-SHACL". There is more than one to allow for the validation of subsets of the total body of SHACL elements defined in the various SHACL specifications. +
++ Each SHACL-SHACL graph corresponds to the scope of individual SHACL specifications and are available as RDF resources: +
++ Additionally, the union of the above shapes graphs is also provided: +
++ The SHACL-SHACL shapes graphs listed above can be retrieved from their namespace IRIs and are also available within the W3C SHACL Resources repository which also contains other community-generated SHACL resources. +
++ The SHACL-SHACL Shapes graphs do not import into or alter the data they are evaluating, so will not affect an + organisation's information if applied to it, only report on its validity according to the vocabulary-subset of SHACL corresponding to the used Shapes graph and its imports of other SHACL-SHACL Shapes graphs. (E.g., all SHACL-SHACL shapes graphs will import SHACL-SHACL Core.) It will also not + automatically export results anywhere beyond a SHACL processor's standard output channel. +
++ For these reasons, this content is expected to present minimal security and privacy concerns. +
+Many people contributed to this document, including members of the RDF Data Shapes Working Group.
+This document describes the Shapes Constraint Language (SHACL) validator for SHACL data, referred to as "SHACL-SHACL".
-- This specification is published by the Data Shapes Working Group. -
-TODO
-TODO: This section will describe the Shapes created for SHACL-SHACL.
-- These shapes are available in the RDF resource at http://www.w3.org/ns/shacl-shacl. -
-TODO: This section will describe the governance arrangements in place for the continued maintenance of this NOTE.
-- This Shapes graph does not import into or alter the data it is evaluating so will not affect an - organisation's information if applied to it, only report on its SHACL Core validity. It will also not - automatically export results anywhere beyond a SHACL processor's standard output channel. -
-- For these reasons, this content is expected to present minimal security and privacy concerns. -
-- The shapes graph of SHACL-SHACL is available as an RDF resource at http://www.w3.org/ns/shacl-shacl. -
-Many people contributed to this document, including members of the RDF Data Shapes Working Group.
-- SHACL 1.0 included the total information about SHACL-SHACL inline, within an Appendix, consisting of an - introductory paragraph and the SHACL-SHACL RDF data only. SHACL 1.2 has dedicated this entire Note to - define and describe SHACL-SHACL. -
-- A reference to this Note is retained in SHACL 1.2 Core. -
-