Feature limitations

SPARQL.ex does currently not support the complete feature set of SPARQL 1.1. Here's a checklist of what's currently supported:

  • [ ] SPARQL 1.1 Query Language
    • [x] Basic Graph Pattern matching
    • [x] Group Graph Pattern matching
    • [x] Optional Graph Pattern matching via OPTIONAL
    • [x] Alternative Graph Pattern matching via UNION
    • [ ] Pattern matching on Named Graphs via FROM and GRAPH
    • [ ] Solution sequence modification
      • [x] Projection with the SELECT clause
      • [x] Assignments to variables in the SELECT clause
      • [x] DISTINCT
      • [x] REDUCED
      • [ ] ORDER BY
      • [ ] OFFSET
      • [ ] LIMIT
    • [x] Restriction of solutions via FILTER
    • [x] All builtin functions specified in SPARQL 1.0 and 1.1
    • [x] Ability to define extension functions
    • [x] All XPath constructor functions as specified in the SPARQL 1.1 spec
    • [x] Assignments via BIND
    • [x] Negation via MINUS
    • [ ] Negation via NOT EXIST
    • [ ] Inline Data via VALUES
    • [ ] Aggregates via GROUP BY and HAVING
    • [ ] Subqueries
    • [ ] Property Paths
    • [ ] ASK query form
    • [ ] DESCRIBE query form
    • [x] CONSTRUCT query form
  • [ ] SPARQL 1.1 Update
  • [x] SPARQL Query Results XML Format
  • [x] SPARQL 1.1 Query Results JSON Format
  • [x] SPARQL 1.1 Query Results CSV and TSV Formats
  • [x] SPARQL 1.1 Protocol (currently client-only with the SPARQL.Client)
  • [ ] SPARQL 1.1 Graph Store HTTP Protocol
  • [ ] SPARQL 1.1 Service Description
  • [ ] SPARQL 1.1 Federated Query
  • [ ] SPARQL 1.1 Entailment Regimes

The SPARQL.Client supports the full SPARQL 1.1 query language. The missing query language features in this list are just not yet supported by the query engine executing queries against RDF.ex data structures.