RDFtk: IO

This crate provides traits for reading and writing Statements and Graphs as well as implementations of these for common representations.

The following are some well-known formats (see Wikipedia for a description of different serializations), support is indicated in the final column with an R for read support and W for write support. One additional module, dot allows for the creation of GraphViz dot files for a visualization of a graph's structure.

| Module | Name | MIME Type | Specification | R/W | |----------|---------------|-------------------------------------------------|---------------|-----| | nt | | application/n-triples | W3C | W | | nq | | application/n-quads | W3C | W | | n3 | | text/rdf+n3 | W3C Submission | | | turtle | | text/turtle | W3C | W | | json | RDF/JSON | application/rdf+json | W3C | | | json_ld | JSON-LD | application/ld+json | W3C | | | xml | RDF/XML | application/rdf+xml | W3C | | | TBD | | text/html | W3C | | | TBD | TriG | application/trig | W3C | | | TBD | HDT | | W3C Submission | | | TBD | BinaryRDF | application/x-binary-rdf | Community | |

Each module will also provide public constants NAME, FILE_EXTENSION, and MIME_TYPE.

Changes

Version 0.1.6

• Made all modules have separate reader/writer sub-modules.
• Put all modules behind features.
• Added JSON writer.
• Re-write NQuad writer to write datasets.
• Re-wrote NTripe writer to use NQuad writer.
• Fixed formatting in Turtle writer.
• Added XML writer.

Version 0.1.5

• Internal change to use StatementRef.

Version 0.1.4

• API changes in core crate:
  • Altered PrefixMappings::compress and PrefixMappings::expand to take references.

Version 0.1.2

• Made all IRI into IRIRef.

Version 0.1.1

• Made all local dependencies only major/minor valued.

Version 0.1.0

• First release.
• Provides write support only for N-Triples, N-Quads, and GraphViz.

TODO

1. The core; N-Triples, N-Quads, N3, and Turtle need read and write support.
2. The extended core; RDF/XML, JSON-LD, and RDFa need read and write support.
3. The rest; RDF/JSON, TriG, HDT, and BinaryRDF will be implemended as needed.