Administración especializada > Adecuación de los objetos de negocio > Administración de reglas de inicialización de objetos > Understanding Object Initialization Rules > Changing Versioning Schemes > Harvard Series Versioning Schemes > File-based Scheme
  
File-based Scheme
When using a file-based scheme for versioning, version identifiers are assigned from an XML file that is loaded into the database. The values in the XML file can establish the version identifiers that are used when a part, document, or CAD document is revised.
The XML file that is loaded must have the following format:
<?xml version="1.0" encoding="UTF-8"?>
<scheme>
<series name = "name1">
<value>P1</value>
<value>P2</value>
<value>P3</value>
</series>
</scheme>
* 
You must have at least two value elements in your XML file.