25 lines
820 B
Markdown
25 lines
820 B
Markdown
[uaxid.def.stable]
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# Annex E (informative) Conformance with UAX #31 [[uaxid]](./#uaxid)
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## E.2 R1 Default identifiers [[uaxid.def]](uaxid.def#stable)
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### E.2.2 R1b Stable identifiers [uaxid.def.stable]
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/uax31.tex#L53)
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An implementation of UAX #31 may choose to guarantee
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that identifiers are stable across versions of the Unicode Standard[.](#1.sentence-1)
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Once a string qualifies as an identifier it does so in all future versions[.](#1.sentence-2)
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/uax31.tex#L58)
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C++ does not make this guarantee,
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except to the extent that UAX #31 guarantees
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the stability of the XID_Start and XID_Continue properties[.](#2.sentence-1)
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