mirror of
https://github.com/cookiengineer/audacity
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65 lines
2.7 KiB
Markdown
65 lines
2.7 KiB
Markdown
Serd
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====
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Serd is a lightweight C library for RDF syntax which supports reading and
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writing [Turtle][], [TriG][], [NTriples][], and [NQuads][]. Serd is suitable
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for performance-critical or resource-limited applications, such as serialising
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very large data sets or embedded systems.
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Features
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--------
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* **Free:** Serd is [Free Software][] released under the extremely liberal
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[ISC license][].
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* **Portable and Dependency-Free:** Serd has no external dependencies other
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than the C standard library. It is known to compile with GCC, Clang, and
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MSVC (as C++), and is tested on GNU/Linux, MacOS, and Windows.
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* **Small:** Serd is implemented in a few thousand lines of C. It typically
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compiles to about 100 KiB, or about 50 KiB stripped with size optimizations.
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* **Fast and Lightweight:** Serd can stream abbreviated Turtle, unlike many
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tools which must first build an internal model. This makes it particularly
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useful for writing very large data sets, since it can do so using only a
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small amount of memory. Serd is, to the author's knowledge, the fastest
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Turtle reader/writer by a wide margin (see [Performance](#performance)
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below).
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* **Conformant and Well-Tested:** Serd passes all tests in the Turtle and TriG
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test suites, correctly handles all "normal" examples in the URI
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specification, and includes many additional tests which were written
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manually or discovered with fuzz testing. The test suite is run
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continuously on many platforms, has 100% code coverage by line, and runs
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with zero memory errors or leaks.
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Performance
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-----------
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The benchmarks below compare `serdi`, [rapper][], and [riot][] re-serialising
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Turtle data generated by [sp2b][] on an i7-4980HQ running Debian 9. Of the
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three, `serdi` is the fastest by a wide margin, and the only one that uses a
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constant amount of memory (a single page) for all input sizes.
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Documentation
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-------------
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* [API reference](https://drobilla.gitlab.io/serd/doc/html/index.html)
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* [`serdi` man page](https://drobilla.gitlab.io/serd/man/serdi.html)
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-- David Robillard <d@drobilla.net>
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[Turtle]: https://www.w3.org/TR/turtle/
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[TriG]: https://www.w3.org/TR/trig/
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[NTriples]: https://www.w3.org/TR/n-triples/
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[NQuads]: https://www.w3.org/TR/n-quads/
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[Free Software]: http://www.gnu.org/philosophy/free-sw.html
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[ISC license]: http://opensource.org/licenses/isc
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[rapper]: http://librdf.org/raptor/
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[riot]: https://jena.apache.org/
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[sp2b]: http://www2.informatik.uni-freiburg.de/~mschmidt/docs/sp2b.pdf
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