| @@ -844,17 +844,25 @@ interface mixin Association { |
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**Association** represents an internal relation from one node to another. |
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An `identifier` field must be present. |
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-It can match an `identifier` field on another node. |
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+It can match another node. |
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+`identifier` is a source value: character escapes and character references are |
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+*not* parsed. |
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+Its value must be normalized. |
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A `label` field can be present. |
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-It represents the original value of the normalised `identifier` field. |
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- |
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-Whether the value of `identifier` is expected to be a unique identifier or not |
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-depends on the type of node including the **Association**. |
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-An example of this is that `identifier` on [**Definition**][dfn-definition] |
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-should be a unique identifier, whereas multiple |
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-[**LinkReference**][dfn-link-reference]s can have the same `identifier` and be |
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-associated with one definition. |
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+`label` is a string value: it works just like `title` on a link or a `lang` on |
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+code: character escapes and character references are parsed. |
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+ |
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+To normalize a value, collapse markdown whitespace (`[\t\n\r ]+`) to a space, |
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+trim the optional initial and/or final space, and perform case-folding. |
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+ |
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+Whether the value of `identifier` (or normalized `label` if there is no |
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+`identifier`) is expected to be a unique identifier or not depends on the type |
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+of node including the **Association**. |
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+An example of this is that they should be unique on |
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+[**Definition**][dfn-definition], whereas multiple |
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+[**LinkReference**][dfn-link-reference]s can be non-unique to be associated with |
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+one definition. |
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### `Reference` |
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