Copyright (c) 2005 - 2016 Franz, Incorporated

Last updated 7 September 2016 at 11:57

• Documentation Index
  • Release Notes
  • Quick Start
  • Introduction
  • Setup and Configuration
    • Download
    • Server Installation
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    • WebView
    • Database Upgrading
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    • Performance Tuning
    • Deleting Duplicate Triples
    • Purging Deleted Triples
    • Auditing
    • Replication
    • Point-in-Time Recovery
    • Transaction Log Archiving
    • Security Overview
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  • Tools
    • Data Loading
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    • Querying
    • RDFS++
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  • Details
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    • Datatypes
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  • Querying
    • SPARQL documentation summary
    • SPARQL Reference
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  • Franz, Inc.

Introduction

Release 4.11 of AllegroGraph provides numerous enhancements and bug fixes for the SPARQL 1.1 query engine.

Supported features

AllegroGraph provides support for

• SPARQL 1.1 Query,
• SPARQL 1.1 Update,
• SPARQL 1.1 Federated Query,
• SPARQL 1.1 Query Results JSON Format,
• SPARQL 1.1 Query Results CSV and TSV Formats,
• SPARQL Query Results XML Format (Second Edition)

It does not directly support entailment regimes but AllegroGraph's RDFS++ reasoner or OWL Materializer can be used to support inference.

We also do not support some of the changes between 1.0 and 1.1 in the SPARQL Protocol. Lastly, we do not support the Graph Store HTTP Protocol (note that all of the functionality in this protocol can be found using SPARQL Update).

SPARQL functions

Aside from the following caveats, AllegroGraph's sparql-1.1 engine supports all of the functions in the specification.

• we do not yet support the timezone or tz datetime functions

• we do not yet support the SHA384 hash function

• the BNODE function only works correctly in the no argument case

DAWG test failures

• the query parser does not correctly parse some legal but unusual forms like :c:d, :c\~z`, or a triple like :: z:: :12.3`.

• AllegroGraph encodes numbers and dates directly rather than storing them as strings. This means that the following literals will all encode the same way: "+1"^^xsd:integer, "1"^^xsd:integer, and "0001"^^xsd:integer. DAWG tests that rely on non-canonical values being able to round-trip will fail.

• the (pp37) Nested (*)* DAWG test fails.

If you find any other problems (with conformance or performance) please let us know by e-mailing support.