Add the --merge-graphs option #254
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Karolina-Bogacka
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Feb 1, 2026
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Karolina-Bogacka
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Makes complete sense as a new feature, looking at it I'm now kind of surprised that we did not have that before
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Issue #253
I also did a small refactor to implement this without too many hacks.
This adds some if/elses in the writer handler, but these should be extremely easy to optimize away by the JIT or the CPU branch predictor. The alternative is using dynamic dispatch which usually is pretty bad for performance.
This slightly changes the current behavior with RDF/XML, where it would just ignore anything aside from the default graph – this does not happen with NT/Turtle! Now all triple-only formats will throw a proper error when you try to do that. That behavior was introduced originally by Jena, not us.