The URL of the file that you are defining a relationship
to. Click the Browse button to browse to and select a file, or type
a path in the box. Note that this attribute does not indicate a
file that you’re linking to in the usual HTML sense; the relationships
specified in a Link element are more complex.
ID
Specifies a unique identifier for the link.
Title
Describes the relationship. This attribute has special
relevance for linked style sheets; for more information, see the
External Style Sheets section of the HTML 4.0 specification on the
World Wide Web Consortium website at www.w3.org/TR/REC-html40/present/styles.html#style-external.
Rel
Specifies the relationship between the current document
and the document in the Href box. Possible values include Alternate, Stylesheet, Start, Next, Prev, Contents, Index, Glossary, Copyright, Chapter, Section, Subsection, Appendix, Help,
and Bookmark. To specify more than one relationship,
separate values with a space.
Rev
Specifies a reverse relationship (the opposite of Rel)
between the current document and the document in the Href box. Possible
values are the same as those for Rel.