Map Development Area (MDA)
Location:
_/_
markup
_/_
xml
_/_
xpath
_/_
xpath
| xpath |
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Types:
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concepts
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data types, location steps, axes, predicates, location paths
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example
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//Book
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data-types
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node-set, boolean, number (floating-point), string -- some expression return values, some nodes -- node-sets cannot contain duplicates
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example
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//Book[title = "Rumsti Ramsti"]
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Comment:
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language for addressing parts of an XML document -- declarative node selection language -- read-only (although tools exist to build XML documents via XPath) -- not really a 'retrieval' language like SQL but often also used stand-alone
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example
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/BookStore/Book
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Comment:
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formally part of XSLT -- defined 1999, not compatible with DOM, XQuery and XML Schema
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example
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//Book[contains(title, "Rumsti")]/author[position() = 2]
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