Virtlab:Validace XML

Z VirtlabWiki

V prvních verzích Virtlabu jsme validovali XML pomocí DTD, nicméně tento způsob má velké limity, proto jsme přešli na validaci pomocí Relax-ng (jde o variantu XMLSchema).

Soubory relax-ng používané pro validaci jsou uloženy v SVN

• DISTR/xml/RELAXNG/ ... což je symbolický odkaz do DISTR/web/relax
• SVN

Ukázka (taskupload.rng)

<?xml version="1.0" encoding="UTF-8"?>

<!-- RELAX NG schema pro popis ulohy -->
<grammar xmlns="http://relaxng.org/ns/structure/1.0"
         xmlns:html="http://www.w3.org/1999/xhtml"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
         
  <start>
    <!-- zacatek -->
    <element name="task">
      <!-- atribut "name" -->
	  <attribute name="name">
	    <data type="string">
	      <param name="minLength">1</param>
	      <param name="maxLength">35</param>
	    </data>
	  </attribute>
	
	  <!-- nepovinny atribut "time" -->
      <optional>
	    <attribute name="time">
	      <data type="decimal">
	        <param name="minInclusive">0</param>
	        <param name="maxExclusive">10000000</param>
	      </data>
	    </attribute>
      </optional>

	  <!-- Element popisující jméno v dlouhém formátu -->
	  <element name="longname">
	      <data type="string">
	        <param name="minLength">1</param>
	        <param name="maxLength">150</param>
	      </data>
	  </element>

	  <!-- Element pro popis -->
	  <element name="description">
	      <data type="string">
	        <param name="minLength">1</param>
	        <param name="maxLength">250</param>
	      </data>
	  </element>


	  <!-- Popis zadani -->
    <element name="specification">
        <zeroOrMore>
          <ref name="file" />
        </zeroOrMore>
	  </element>

	  
	  <!-- Popis obrazku -->
    <element name="picture">
  	  <optional>
        <ref name="file" />
  	  </optional>
    </element>
	  
	  <!-- Popis preconf -->
    <element name="pre_conf">
	    <optional>
        <ref name="file" />
      </optional>
	  </element>

	  <!-- Popis postconf -->
    <element name="post_conf">
  	  <optional>
        <ref name="file" />
      </optional>
    </element>
    
	  <!-- Popis topology -->
    <element name="topology">
  	  <optional>
        <ref name="file" />
  	  </optional>
    </element>

	  <!-- Popis dia obrazku -->
    <element name="dia_picture">
  	  <optional>
        <ref name="file" />
  	  </optional>
    </element>


    </element>
  </start>
  <!-- konec hlavni casti -->

  
  <!-- nasleduje definice pouzitych elementu a atributu -->
  
  <!-- Definice elementu "file". Na definici se odkazuji pomoci 'ref name="file"' -->
  <define name="file">
    <element name="file">
	    <attribute name="name">
	      <data type="string">
	        <param name="minLength">1</param>
	        <param name="maxLength">49</param>
	      </data>
	    </attribute>
	    <optional>
	    <attribute name="lang">
	      <data type="string">
	        <param name="minLength">1</param>
	        <param name="maxLength">5</param>
	      </data>
	    </attribute>
	    </optional>
	    <attribute name="filepath">
	      <data type="string">
	        <param name="minLength">1</param>
	        <param name="maxLength">299</param>
	      </data>
	    </attribute>
	    <attribute name="exists">
	      <choice>
	        <value>yes</value>
	       <value>no</value>
	      </choice>
	    </attribute>
	</element>
  </define>
 

<!-- konec RELAX NG schematu -->	
</grammar>