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Package easyrdf
Short Description EasyRdf is a PHP library designed to make it easy to consume and produce RDF.
License BSD-3-Clause
Informations about the package easyrdf
EasyRdf (Fork)
About this fork 🚀
This is a fork of EasyRdf which I maintain in my spare time. My objective is to keep EasyRdf alive and usable on latest PHP versions. Code is more or less maintained but not developed any further. If you wanna participate, feel free to open a pull request! For more information about this fork, scroll at the end of this document.
About EasyRdf
EasyRdf is a PHP library designed to make it easy to consume and produce RDF. It was designed for use in mixed teams of experienced and inexperienced RDF developers. It is written in Object Oriented PHP and has been tested extensively using PHPUnit.
After parsing EasyRdf builds up a graph of PHP objects that can then be walked around to get the data to be placed on the page. Dump methods are available to inspect what data is available during development.
Data is typically loaded into an EasyRdf\Graph
object from source RDF
documents, loaded from the web via HTTP. The EasyRdf\GraphStore
class
simplifies loading and saving data to a SPARQL 1.1 Graph Store.
SPARQL queries can be made over HTTP to a Triplestore using the
EasyRdf\Sparql\Client
class. SELECT
and ASK
queries will return an
EasyRdf\Sparql\Result
object and CONSTRUCT
and DESCRIBE
queries will return
an EasyRdf\Graph
object.
Example
Requirements
- PHP 8.0 or higher
- PHP Extensions: dom, mbstring, pcre, xmlreader
- PHP Libs: libxml
Features
- No required external dependencies upon other libraries (PEAR, Zend, etc...)
- Library runs in Linux and Windows environments
- Extensive unit tests written using PHPUnit
- Built-in parsers and serialisers: RDF/JSON, N-Triples, RDF/XML, Turtle
- Optional parsing support for: ARC2, rapper
- Optional support for
Laminas\Http\Client
andZend\Http\Client
- Type mapper - resources of type
foaf:Person
can be mapped into PHP object of classFoaf_Person
- Support for visualisation of graphs using GraphViz
- Comes with a number of examples
List of Examples
basic.php
- Basic "Hello World" type examplebasic_sparql.php
- Example of making a SPARQLSELECT
queryconverter.php
- Convert RDF from one format to anotherdump.php
- Display the contents of a graphfoafinfo.php
- Display the basic information in a FOAF documentfoafmaker.php
- Construct a FOAF document with a choice of serialisationsgraph_direct.php
- Example of usingEasyRdf\Graph
directly withoutEasyRdf\Resource
graphstore.php
- Store and retrieve data from a SPARQL 1.1 Graph Storegraphviz.php
- GraphViz rendering examplehtml_tag_helpers.php
- Rails Style html tag helpers to make the EasyRdf examples simplerhttpget.php
- No RDF, just testEasyRdf\Http\Client
open_graph_protocol.php
- Extract Open Graph Protocol metadata from a webpageserialise.php
- Basic serialisation examplesparql_queryform.php
- Form to submit SPARQL queries and display the resultuk_postcode.php
- Example of resolving UK postcodes using uk-postcodes.comwikidata_villages.php
- Fetch and information about villages in Fife from Wikidatazend_framework.php
- Example of usingZend\Http\Client
with EasyRdf
Contributing
Contributions are welcome! Please read CONTRIBUTING.md for further information.
For further information about extending / hack EasyRdf please read DEVELOPER.md.
Further mainainers are possible, please send an email to @k00ni.
Running Examples
The easiest way of trying out some of the examples is to use the PHP command to run a local web server on your computer.
Then open the following URL in your browser: http://localhost:8080/
Why this fork? (written in late 2020)
EasyRdf was in maintenance mode since 2017 (link) and not actively maintained since. There were 6+ pull requests pending at that time with fixes and new features. Its sad to see another RDF PHP project die slowly, so I decided to clean house and give the code a new home (further info). A few months in late 2020 EasyRdf was actively improved (me being a co-maintainer for a while), but that stopped and decay began again. It was a frustating time, lets leave it at that.
In the end I decided to abandon my old fork and start fresh with latest EasyRdf improvements in this repository.
What can you expect as a user?
This fork (v1.*) aims to be a drop-in replacement for the easyrdf/easyrdf
package, which means, you can use it without changing your code. But you should still read the notes of the latest release, to make sure nothing unexpected happens after an update.
What can you expect as an EasyRdf developer?
This repository is set up in a way to lower the maintenance overhead in comparison to the original version. Test related tools were partly replaced with more lightweight solutions. Furthermore this repository is held by an organization instead of a user, which allows more flexible maintenance.
Whats next? Whats my plan?
As stated above, main objective is to keep EasyRdf's legecay code up to date and compatible with latest PHP versions. I welcome pull requests and try to react as fast as possible. If there are useful pull requests in easyrdf/easyrdf (and I have time to spare), I will picked them up and integrate them here (for instance https://github.com/sweetrdf/easyrdf/pull/9, https://github.com/sweetrdf/easyrdf/pull/14).
Licensing
The EasyRdf library and tests are licensed under the BSD-3-Clause license. The examples are in the public domain, for more information see UNLICENSE.
All versions of easyrdf with dependencies
ext-dom Version *
ext-mbstring Version *
ext-pcre Version *
ext-xmlreader Version *
lib-libxml Version *
sweetrdf/rdf-helpers Version ^2.0