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Add a note about representing the string * in a key #1002

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Merged
merged 3 commits into from
Feb 13, 2025
Merged

Add a note about representing the string * in a key #1002

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f515a06
Add a note about representing the string `*` in a key
aphillips Feb 10, 2025
5e9aea1
Fix typo
aphillips Feb 10, 2025
a1d5aba
Update spec/syntax.md
aphillips Feb 11, 2025
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10 changes: 10 additions & 0 deletions spec/syntax.md
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Expand Up @@ -461,6 +461,16 @@ A _key_ can be either a _literal_ value or the "catch-all" key `*`.
The **_<dfn>catch-all key</dfn>_** is a special key, represented by `*`,
that matches all values for a given _selector_.

> [!NOTE]
> To represent a _key_ consisting of the character `*` U+002A ASTERISK,
> use a _quoted literal_:
> ```
> .input {$value :string}
> .match $value
> |*| {{Matches the string *}}
> * {{Matches any other string}}
> ```

The value of each _literal_ _key_ MUST be treated as if it were in
[Unicode Normalization Form C](https://unicode.org/reports/tr15/) ("NFC").
Two _literal_ _keys_ are considered equal if they are canonically equivalent strings,
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