FS#917 invalid xhtml (double id attributes)

CSS, XHTML, JS, Browsers

• 

  2006-09-22 doekman

  It's possible to create invalid XHTML, by using two headings with the same name. For example:
  
  ====== example ======
  ====== example ======
  
  This will result in the following XHTML:
  <h1><a name="example" id="example">example</a></h1>
  <h1><a name="example" id="example">example</a></h1>
  
  I don't think this is a theoretical use-case. I experienced it with the following (Dutch) page (OK, the blog plugin is also causing some invalid XHTML, but that's not the point):
   http://retortplusplus.org/home/projecten/adger/intro
  
  The thing is: you can generate invalid XHTML with DokuWiki, without enabling HTML and PHP inclusion. I think the engine needs to keep track of all used id-attributes, and use sequence numbers to prevent double id's. The output will than be:
  
  <h1><a name="example" id="example">example</a></h1>
  <h1><a name="example_1" id="example_1">example</a></h1>
  
  And while you're at it, you might want to add explicit id's the headings, like in trac (http://trac.edgewall.org/wiki/WikiFormatting#Headings):
  
  ====== A quick and dirty example ====== #qd_example
  
  will result in
  
  <h1><a name="qd_example" id="qd_example">example</a></h1>
  
• 

  2006-09-22 andi

  already fixed in devel