Release 3.3.1

• Update test suite locations.
• Verify that table row variable count matches declared variables.
• CONCAT() without parameter
• Update dependencies on SXP and EBNF.
• Unescape PName.
• fixing missing block argument in sequence operator

Release 3.3.0

Updates for version 3.3.0 with minimum Ruby version 3.0.

Release 3.2.6

• Relax dependency on rack and sinatra.
• Fix checking for equality of blank nodes, variables, and functions containing either in parser.
• Fix expected SXP for group example.
• Update test suite locations. (Introduces some problems to investigate later).

Release 3.2.5

• Simplify STR_EXPR terminal by using \s+ instead of #{WS} due to changes in Ruby 3.2 regular expressions. Fixes #45.
• Change the way depth keyword argument is passed when used with **options.
• Address problem in results when adding a singleton method to a frozen result.

Release 3.2.4

• Assign pre-bound variables in Filter and LeftJoin, as necessary.
• Assign pre-bound variables in Expand, as necessary.
• Parse SERVICE operator.
• Update RDF dependency to 3.2.8.

Release 3.2.3

• Re-publish gem due to file permission problem.
• Document the ability to use a solution as query bindings, not just expression bindings. This supports pre-bound variables, for example as used by SHACL.

Release 3.2.2

• General:
  • Update parser to merge patterns and paths, as sequencing is important. Fixes #42.
  • Add :all_vars option to parser, which will emit a (project () (...)) when a SELECT * is parsed. This currently defaults to false, but will become true, or non=optional in a future release. This causes SELECT * to project all in-scope variables.
  • Better error detection when using variables from groups that are not exported.
  • Fix result formats for boolean values.
  • Implements SPARQL 1.1 Protocol using the new SPARQL::Server Sinatra application.
• Documentation
  • Update documentation links to use gh-pages, and add action to publish gh-pages from Yard docs.
• SPARQL 1.2
  • Updates to support SPARQL 1.2 SEP-002 for XPath date/time/dateTime/duration functions and operations.
  • Parse property path ranges. (e.g., :a :b{1,2} :c. For SPARQL 1.2 SEP-0003.
  • Add path_range and path_zero operators to support path min/max.
• SPARQL*
  • Use qtriple for quoted triples instead of triple, which can be confused with the TRIPLE function.
  • Restore Operator::Triple, and add SXP parsing rules to distinguish (triple) function from pattern. As a pattern, it can appear as the child of the following: BGP, Construct, Delete, DeleteData, DeleteWhere, Graph, Insert, InsertData, or Path.
  • Add qtriple for quoted triples, with support of the quoted attribute of an RDF::Statement/Pattern.

Release 3.2.1

Finish up most remaining to_sparql serialization use cases.

• Round-tripping SPARQL using extension functions (other than XSD) requires those functions to be included in the runtime.
• Improve Algebra documentation, with specific references to Jena.
• Minor improvement to parser error reporting.

Release 3.2.0

• Minimum Ruby version now 2.6.
• Synch with SXP changes in version 1.2 of the SXP gem. Move some to_sxp to the SXP gem.
• Update algebra examples with SPARQL Grammar and resulting SSE.
• Initial implementation of SPARQL::Algebra::Operator#to_sparql (and related for operator-like classes). (For #38.)
  • Update sparql CLI and README for outputting query in SPARQL Grammar format.
  • Caveat Emptor: this is a highly experimental feature and subject to further revision. Further testing has shown many failure modes, but look to improvements in future releases.

Release 3.1.8

• Add logger as a dependency and require in bin/sparql. (Fixes #37.)
• Update grammar for RDF-star Embedded => Quoted changes.