Patent attributes
A document can contain multiple print layers. Different layers can be combined to produce different document versions. In this manner, a document can have an English version and a Spanish version sharing graphics layers but having different text layers. A document version specification can be used for producing a certain version of the document. Some documents, however, have many layers and desired layer combinations. A set of document version specifications can be used to ensure that all the desired versions are produced without any version being forgotten or any undesired version being produced. Dividing the layers amongst a set of layer groups helps in creating the specifications. A set of rules can be submitted to a rule module to automatically generate the desired specifications.