[rights-examples] ln004: use case with markup for review

No XrML sample markup is necessary. I realized that the ln004 scenario,

  Rights for reproduction of the text content are governed by contract
  cn234123 between the provider and LexisNexis; rights for reproduction
  of the images are governed by contract cn332789.

is not something to specify in the XrML license itself, but that just as a
URI corresponding to an XrML license element's licenseId attribute can be
referenced from content (as demonstrated by ln002), a URI could be assigned
to a contract and referenced the same way. The file ln004article.xml below
demonstrates.

Bob


<!-- start of ln004article.xml -->

<article xmlns:re="http://www.whatever.com/ns/RightsExpression"
         re:access="http://www.whatever.com/RightsLicenses/cn234123">

  <para>Here is the first paragraph.</para>

  <para>Here is the second paragraph.</para>

  <picture re:access="http://www.whatever.com/RightsLicenses/cn332789"
			  resource="http://www.whatever.com/pics/p1.jpg"/>

  <para>Here is the third paragraph.</para>

  <picture re:access="http://www.whatever.com/RightsLicenses/cn332789"
			  resource="http://www.whatever.com/pics/p2.jpg"/>

</article>

<!-- end of ln004article.xml -->