Internal documents are cable block diagrams, single line diagrams, schematic drawings, wiring diagrams, and power distribution board layout design drawings. You create these documents for selected electrical items and, therefore, you do not need to associate them with the items. The software adds your internal documents to the document repository automatically and you can associate them with other electrical items as needed. You can add and maintain revisions in internal documents. The software allows you to select a revision numbering method, enter a revision number, date, short description, and the name of the person who modified the document. Also, you can add or update the last revision of a number of selected documents. When you work with internal documents, your tasks mostly include managing revisions for single or multiple documents, archiving documents and comparing them with current versions.