Linking to the Platform


Persistent Links to Credo Online Reference Service

You can link to Credo Online Reference Service content in a variety of ways. Here is an overview of the link syntax Credo uses.

Basic home page link for Credo:

The Permalink URLs available on all pages are the best links to use as persistent links. Look for the chain icon at the top of each page. These links will include your proxy or institution ID information if you have selected a preferred remote access method in Admin.



Read below for more information on linking to:

Find a Book
Titles by subject
Single title
Specific tabs for a title
Search page
Search results

Linking to the Find a Book page

This link leads to the title list page, where you can view a list of all titles within your account.


Linking to titles about a subject

This link style leads to the title list for a selected subject. Example:

Click here for a full list of subject URLs.

Linking to title pages

Every title in Credo Online Reference Service has a unique URL. This URL defaults to the "Contents" page of the book (where available).

To construct these links, replace bookname with the short name for the book. For example, to link to the "Contents" page for The Oxford Companion to Sugar and Sweets:

You can take these URLs from the Permalink at the top of the Credo platform (the chain icon), your browser's address bar, or authorized Admins can download a title list complete with these links from the Credo Admin account. To learn more about this and other Admin functions, see our Admin Help Page.

Other tabs under Find a Book can be linked to directly. Note that not every book has the same available tabs.

  • - to link to a book's Table of Contents or headings lists
  • - to link to a book's image list
  • - to link to a book's audio file list
  • - to link to a book's video list
  • - to link to a book's person list
  • - to link to a book's location list


Linking to an individual entry

Every entry in Credo Online Reference Service has a unique persistent URL that displays in "Permalink" menu function and in the citation at the bottom of the entry page. Example:

Replace bookname with the short name for the book and entryheading with the heading for the entry. As an example, the URL for the 'Megaliths' entry from Elsevier's Encyclopedia of Archaeology is:

If there are two entries with the same heading in a single title, the "0" at the end of the entry link will change. For example, the second entry for "Ceres" in the Britannica Concise Encyclopedia has a "1" in the final position:

The Permalink for each entry is the best guide to the proper URL.

Linking to a custom start page

There are four different pages on which a user may start a search. Each can be linked to directly from outside Credo Online Reference Service:

Linking to search results

You can perform a keyword search with your URL. Example:


Replace TERM with the desired keyword search.

You can add a subject limit to the query by adding a subjectcode parameter. E.g.

The best place to find the URLs with the subject codes is the permalink function of the Credo platform, or contact for a list.

Notes on linking:

  1. If the user cannot be automatically authenticated using a TCP/IP address or a referring URL, then the login page will be shown. After entering a valid login, the user will then see the requested page.
  2. If you use a proxy for access, you may find that additional parameters of some deeplinks are dropped when going through the proxy. To resolve this, update your proxy prefix in Credo Admin to use qurl= instead of url= at the end, and check the box "My proxy requires URL encoding", or contact for help. 
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