1. A method for detecting configuration conflicts between configuration files in a content management system (CMS), comprising: receiving a content processing rule to be applied to one or more documents managed by the CMS, wherein the content processing rule references at least one document attribute; determining that the attribute is a member of a repeating attribute group specified by a document type configuration associated with a document type, wherein the repeating attribute group specifies a plurality of document attributes that should occur with the same number of values in instances of the document type, and wherein the repeating attribute group includes the document attribute referenced by the content processing rule; and upon determining that, when applied to a first instance of the document type, the content processing rule could modify the first instance of the document type to include a differing number of values for the plurality of attributes specified in the repeating attribute group, notifying a system administrator.