Hyperlinks

Source Relationship:

http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink

A hyperlink can be stored in a package as a relationship. Hyperlinks shall be identified by containing a target which specifies the destination of the given hyperlink.

example:
<Relationships xmlns="…">
  <Relationship Id="rId1" 
    Type="http://…/hyperlink" 
    Target="http://schemas.openxmlformats.org/wordprocessingml/"
    TargetMode="External"/>
</Relationships>

A hyperlink target may be located within or external to the package containing the source relationship (expressed syntactically, the @TargetMode attribute of the <Relationship> element may be Internal or External).