Requirements
A requirement describes
a condition or capability to which a system must conform; it is either
derived directly from user needs or stated in a contract, standard,
specification, or other formally imposed document.
Creating requirements from document content
Use text in a document to create a new requirement that
contains that text. The document text becomes a link to the new requirement.
You can also embed the name and text of the new requirement in the
document. Embedded requirement content is updated in the document
as the requirement is modified and saved.