Embedding URLs in PDF Documents

With the vast majority of journal articles now available on-line, it is common to cite them not only with a conventional system appropriate for shelves and print, but with the DOI. Systems such as Wikis have templates for doing so, but many people still write notes using Word, and then convert that document to PDF for placement in eg the Blackboard CMS. Producing documents for this purpose has some surprising pitfalls, and hence the procedure is documented here for reference.

Use Office 2007/2008 or later.
Write out a URL in full, as eg http://dx.doi.org/10.1016/S0022-328X(00)85782-4
Select the string, and right mouse click to produce a context sensitive menu. One of the items should be Hyperlink/Edit Hyperlink
Ensure that the Link to and the Display fields match. There is no obvious reason why they should, except it does not work if they do not!
Now for the tricky part. In the URL above (typical of Elsevier), the characters ( and ) appear. These break the Microsoft Word system. Before such a URL can be used, these two offending characters will have to be replaced by %28 and %29 respectively. For other so called escape codes, see e.g. http://www.december.com/html/spec/esccodes.html
Finally, save the document using the save as dialog, specifying PDF.
A click on the URL in the PDF reader should throw up a dialog asking you to confirm connection.
It should lead you to the same URL as DOI:10.1016/S0022-328X(00)85782-4 as resolves here using the Wiki template.