Composite Extension
Composite extension of the X Window System
The Composite Extension of the X Window System renders the graphical output of clients "...to an off-screen buffer. Applications can then take the contents of that buffer and do whatever they like. The off-screen buffer can be automatically merged into the parent window or merged by external programs, called compositing managers."
This enabled the creation of compositing managers for X, capable of effects like transparency, 3D rotation, and jiggly windows.
The composite extension was added to X.org in version X11R6.8 in September 2004.
Begin with the source’s own compact description: “Composite Extension” is composite extension of the X Window System. The dossier treats that line as a proposition to test through Composite, Extension and extension, not as a finished interpretation.
Why this record matters
The phrase “composite extension of the X Window System” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Dec 3, 2023. The linked authority identifier is Q5156735. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2004.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
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Three-step research path
- Establish the record: confirm the title “Composite Extension”, its source revision and the description used here.
- Expand the search: follow Composite Extension primary sources, Composite Extension archive and Composite research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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This entry incorporates text from “Composite Extension” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.