Document properties names file
The document properties names file is an optional file that defines caption information
for custom document properties for display in the user interface. The file is named
docCustomDefinitions.properties. It is associated with custom document properties that you define in the docCustomDefinitions.xml file.If you are using only one language in your environment and you defined custom document
property captions in the docCustomDefinitions.xml file, you do not need to edit the docCustomDefinitions.properties file.