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Pentaho Data Integration Cookbook Second Edition by María Carina Roldán, Adrián Sergio Pulvirenti, Alex Meadows

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Validating well-formed XML files

PEDI 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 <example tag>, end tags </example tag>, or empty element tags <example tag/>, 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—this means that beginning and ending tags match (for instance, <example Tag></example Tag> ...

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