Serd subproject with meson
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David Robillard b1991fe876 Port to argparse 3 years ago
doc Clean up attributes in reference documentation 3 years ago
include Strengthen null annotation on serd_env_get_base_uri() 3 years ago
scripts Port to argparse 3 years ago
src Only use aligned_alloc in C11 3 years ago
test Deprecate serd_uri_to_path() 3 years ago
waflib@d199922025 Fix link errors with sanitizers at the source in autowaf 3 years ago
.gitattributes Add gitattributes to disable newline mangling for RDF files 3 years ago
.gitignore Add __pycache__ to gitignore 4 years ago
.gitlab-ci.yml Make sanitizer failures fatal on CI 3 years ago
.gitmodules Fix autowaf submodule URL 4 years ago
.travis.yml Add Travis configuration 6 years ago
AUTHORS Add AUTHORS file. 13 years ago
COPYING Update stale copyright dates 3 years ago
INSTALL Update INSTALL file 8 years ago
NEWS Deprecate serd_uri_to_path() 3 years ago Remove link to test coverage from README 4 years ago Specify -lm in libs.private for static compilation (#918). 10 years ago
serd.ttl Update metadata 4 years ago
waf Update waf 4 years ago
wscript Run flake8 on 3 years ago


Serd is a lightweight C library for RDF syntax which supports reading and writing Turtle, TriG, NTriples, and NQuads. Serd is suitable for performance-critical or resource-limited applications, such as serialising very large data sets or embedded systems.


  • Free: Serd is Free Software released under the extremely liberal ISC license.

  • Portable and Dependency-Free: Serd has no external dependencies other than the C standard library. It is known to compile with GCC, Clang, and MSVC (as C++), and is tested on GNU/Linux, MacOS, and Windows.

  • Small: Serd is implemented in a few thousand lines of C. It typically compiles to about 100 KiB, or about 50 KiB stripped with size optimizations.

  • Fast and Lightweight: Serd can stream abbreviated Turtle, unlike many tools which must first build an internal model. This makes it particularly useful for writing very large data sets, since it can do so using only a small amount of memory. Serd is, to the author's knowledge, the fastest Turtle reader/writer by a wide margin (see Performance below).

  • Conformant and Well-Tested: Serd passes all tests in the Turtle and TriG test suites, correctly handles all "normal" examples in the URI specification, and includes many additional tests which were written manually or discovered with fuzz testing. The test suite is run continuously on many platforms, has 100% code coverage by line, and runs with zero memory errors or leaks.


The benchmarks below compare serdi, rapper, and riot re-serialising Turtle data generated by sp2b on an i7-4980HQ running Debian 9. Of the three, serdi is the fastest by a wide margin, and the only one that uses a constant amount of memory (a single page) for all input sizes.

Time Throughput Memory


-- David Robillard