Retrieving Repository Feed and Displaying Its Content

To display a feed content to end users, a client must perform the following steps:

1. Retrieve the feed by issuing a HTTP GET request to the feed URL.
   1. If APS Catalog returns the status code 304, fetch the feed from its cache.
   2. If APS Catalog returns a feed, save the feed to cache.
2. Parse the requested feed page for navigation bar links:
   • First feed page link: /link[@rel='first']/@href/text()
   • Previous feed page: /link[@rel='prev']/@href/text()
   • Next feed page link: /link[@rel='next']/@href/text()
   • Last feed page link: /link[@rel='last']/@href/text()
3. Extract the entry elements from the feed and transform them to the required format.

   Note: Steps 2 and 3 are repeated on each feed page request. Step 3 can be easily performed by using XSL transformations.

4. Render a web page with the navigation bar and transformation results, and display the page to end users.

Remarks

A client can create a navigation bar that includes links to all feed pages. This requires utilizing search descriptions. For details on how to add the navigation bar, refer to the Search Descriptions section.