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Pentaho Data Integration 4 Cookbook by María Carina Roldán, Adrián Sergio Pulvirenti

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Validating well-formed XML files

PDI offers different options for validating XML documents, including the validation of a well-formed document. The structure of an XML document is formed by tags that begin with the character< and end with the character>. In an XML document, you can find start-tags:<exampletag>, end-tags:</exampletag>, or empty-element tags:<exampletag/>, and these tags can be nested. An XML document is called well-formed when it follows the following set of rules:

  • They must contain at least one element
  • They must contain a unique root element this means a single opening and closing tag for the whole document
  • The tags are case sensitive
  • All of the tags must be nested properly, without overlapping

In this recipe, you will learn to validate ...

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