====== XPath dnevnik ======
An XPath recipe list. See also [[z:biblio-xpath|Bibliographic XPath Queries]] and [[z:basex-adv|BaseX Adventures]].
===== 1. Find attributes by ends of their value strings =====
   * 2011-09-03
   * XPath 2.0
   * Find all attributes "ana" whose value ends with "exempla"
   * Expression (apply the forward slash abbreviation before ''@ana'' if necessary):  
<blockquote>
''@ana[ends-with(.,"exempla")]''
</blockquote>




===== 2. Find a specific element and all of its descendants of the same kind =====
   * 2011-09-04
   * XPath 2.0
   * Find the "seg" element with the xml:id attribute value "E6.9.4"; also find all "seg" descendants of this element
   * Expression (add double forward slash before seg as needed):
<blockquote>
''seg[ancestor-or-self::seg[@xml:id[. eq  'E6.9.4']]]''
</blockquote>

===== 3. Find all elements with attributes that contain a specific string =====
   * 2011-09-08
   * XPath 2.0
   * Find all elements with attribute ana whose value contains "MARK"
   * Expression (add double forward slash before @ana as needed):
<blockquote>
''@ana[contains(.,"MARK")]''
</blockquote>
===== 4. Retrieve all elements with specific attributes preceded by siblings with specific attributes =====
   * 2011-09-11
   * XPath 2.0
   * Find all seg elements with attribute ana whose value contains "MARK", preceded by seg elements with attribute ana whose value contains "NORMAL"
   * Expression (add double forward slash before seg as needed):
<blockquote>
''seg[@ana[. eq 'MARK']][preceding-sibling::seg[@ana[. eq 'NORMAL']]]''
</blockquote>

===== 5. Retrieve all elements with specific attributes immediately preceded by a sibling with specific attributes =====
   * 2011-09-12
   * XPath 2.0
   * Find all ''seg'' elements with attribute ''@ana'' whose value equals "PLANA", immediately preceded by a ''seg'' element sibling with attribute ''@ana'' whose value contains "tekst"
   * Expression (add double forward slash before ''seg'' as needed):
<blockquote>
''seg[@ana[. eq 'PLANA']][preceding-sibling::seg[1][@ana[contains(.,'tekst')]]]''
</blockquote>

===== 6. Find all elements with odd / even numeric values in attributes =====
   * 2011-12-2
   * XPath 2.0
   * Find all ''anchor'' elements with attribute ''@n'' whose value is an odd number
   * Expression (add double forward slash before ''seg'' as needed):
<blockquote>
''anchor[number(@n) mod 2 = 1]''
</blockquote>
   * Useful link: stackoverflow question [[http://stackoverflow.com/questions/8032198/xslt-template-to-identify-odd-even-numbers|XSLT Template to identify odd/even numbers?]]