The collection of documents retrieved by a query is known as a document set. Along with tools to navigate within a document, we must also provide tools to navigate within a document set. The navigation tools that must be provided are next and previous document. These features will allow a user to traverse a document set going from one document to the next based on the document currently displayed. The database system should also provide the capability of going directly to the first and last document in the set.
Some documents can become very large.
It may not be wise to return the entire document especially if the user is reviewing the information to determine if in fact the document is relevant to his needs. Therefore, it is necessary for the Web browsers to be able to send chunks of a document while the user is determining its importance. Once the user has decided that this document is relevant, at that time some tool may be necessary that does in fact return the entire paper, article or document. The navigational requirements and other aspects of manipulating data through a database system brings an awareness and need for the customization and control over the menu bar. In this particular application each document had its own menu bar drawn as part of the HTML document.