Mercurial > genshi > genshi-test
comparison doc/xpath.txt @ 230:24757b771651
Renamed Markup to Genshi in repository.
| author | cmlenz |
|---|---|
| date | Mon, 11 Sep 2006 15:07:07 +0000 |
| parents | 09f869a98149 |
| children | ebc7c1a3bc4d |
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| 229:110d69dbbda3 | 230:24757b771651 |
|---|---|
| 1 .. -*- mode: rst; encoding: utf-8 -*- | 1 .. -*- mode: rst; encoding: utf-8 -*- |
| 2 | 2 |
| 3 ===================== | 3 ===================== |
| 4 Using XPath in Markup | 4 Using XPath in Genshi |
| 5 ===================== | 5 ===================== |
| 6 | 6 |
| 7 Markup provides basic XPath_ support for matching and querying event streams. | 7 Genshi provides basic XPath_ support for matching and querying event streams. |
| 8 | 8 |
| 9 .. _xpath: http://www.w3.org/TR/xpath | 9 .. _xpath: http://www.w3.org/TR/xpath |
| 10 | 10 |
| 11 | 11 |
| 12 .. contents:: Contents | 12 .. contents:: Contents |
| 16 | 16 |
| 17 ----------- | 17 ----------- |
| 18 Limitations | 18 Limitations |
| 19 ----------- | 19 ----------- |
| 20 | 20 |
| 21 Due to the streaming nature of the processing model, Markup uses only a subset | 21 Due to the streaming nature of the processing model, Genshi uses only a subset |
| 22 of the `XPath 1.0`_ language. | 22 of the `XPath 1.0`_ language. |
| 23 | 23 |
| 24 .. _`XPath 1.0`: http://www.w3.org/TR/xpath | 24 .. _`XPath 1.0`: http://www.w3.org/TR/xpath |
| 25 | 25 |
| 26 In particular, only the following axes are supported: | 26 In particular, only the following axes are supported: |
| 29 * ``child`` | 29 * ``child`` |
| 30 * ``descendant`` | 30 * ``descendant`` |
| 31 * ``descendant-or-self`` | 31 * ``descendant-or-self`` |
| 32 * ``self`` | 32 * ``self`` |
| 33 | 33 |
| 34 This means you can't use the ``parent``, ancestor, or sibling axes in Markup | 34 This means you can't use the ``parent``, ancestor, or sibling axes in Genshi |
| 35 (the ``namespace`` axis isn't supported either, but what you'd ever need that | 35 (the ``namespace`` axis isn't supported either, but what you'd ever need that |
| 36 for I don't know). Basically, any path expression that would require buffering | 36 for I don't know). Basically, any path expression that would require buffering |
| 37 of the stream is not supported. | 37 of the stream is not supported. |
| 38 | 38 |
| 39 Predicates are of course supported, but Path expressions *inside* predicates | 39 Predicates are of course supported, but Path expressions *inside* predicates |
| 62 Querying Streams | 62 Querying Streams |
| 63 ---------------- | 63 ---------------- |
| 64 | 64 |
| 65 :: | 65 :: |
| 66 | 66 |
| 67 from markup.input import XML | 67 from genshi.input import XML |
| 68 | 68 |
| 69 doc = XML('''<doc> | 69 doc = XML('''<doc> |
| 70 <items count="2"> | 70 <items count="2"> |
| 71 <item status="new"> | 71 <item status="new"> |
| 72 <summary>Foo</summary> | 72 <summary>Foo</summary> |