Links
Document links allow users to connect more than one document to one another. There are two types of links: document relationships, which connect two documents, and link groups, which connect larger groups of documents.
You can use document relationships to connect two related documents, such as e-mails and attachments or meeting agendas and agenda packets. Link groups are used to collect any number of related documents, such as all yearly reports, or all documents relation to a particular case.