Mihaela Mihaljevic
537b455ce8
Complete the structural DTD validation layer. AttributeType now distinguishes the ID family; the validator does a second pass after the structural walk (since an IDREF may point forward to an ID later in the document): - ID-typed attribute values must be unique across the document. - IDREF values must each resolve to a declared ID. - IDREFS values are split on whitespace and each token must resolve. Reimplemented from the DTD ID/IDREF spec; no upstream code copied. 4 tests; 79 total.
17 lines
692 B
Swift
17 lines
692 B
Swift
extension PureXML.Validation {
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/// The declared type of a DTD attribute. Remaining tokenized types (NMTOKEN,
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/// ENTITY, and so on) are treated as unconstrained character data; only an
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/// enumeration constrains the value, and the ID family drives cross-document
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/// uniqueness and reference checks.
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enum AttributeType: Equatable {
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case cdata
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case enumeration([String])
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/// `ID`: the value must be unique across the document.
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case id
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/// `IDREF`: the value must match some declared `ID`.
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case idReference
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/// `IDREFS`: each whitespace-separated value must match some declared `ID`.
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case idReferences
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}
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}
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