Thank you for the update Are...i will mark your ticket as solved. Robert
On Fri, Aug 28, 2009 at 3:47 AM, Are Gulbrandsen < [email protected]> wrote: > Hi again > > Thanks for the suggestions. > > I found a simple solution to this. > > As a reference I'll rephrase the challenge: > > - I want to make any search in my application have a corresponding Atom > feed > - The application uses query parameters: ?param1=value1¶m2=value2... > - The feed ID should be the same for any searches wich are equivalent. > parameter permutations can give several equivalent searches: > ?param1=value1¶m2=value2 > ?param2=value2¶m1=value1 > - I want to mint an Atom feed ID using the Tag URI scheme > - The feed ID should be easy for humans to read > > I first looked at the Tag URI scheme, and found how to mint the ID. > Ref http://taguri.org/ > tagURI = "tag:" taggingEntity ":" specific > > The first parts were easy: > tag:duo.uio.no,2009-09: > > The specific part was the challenge. > > The Atom specification was not a great help: > http://tools.ietf.org/html/rfc4287#section-4.2.6 > > I first decided on using a normal query syntax: > search?param1=value1¶m2=value2 > > The problem is that the ampersands are escaped to make the ID-string valid > XML content, which makes an ugly, long and difficult to read ID (a search > can typically have 6 parameters). > > The sollution was in http://en.wikipedia.org/wiki/URI_scheme > where semicolon is suggested as a parameter delimiter in the query, exactly > to avoid the problem with & in the query string. > > (I now know that this was suggestes by Tim Berners-Lee as early as in 1995 > in Hypertext Markup Language - 2.0, ref http://tools.ietf.org/html/rfc1866 > section > 8.2.1) > > We'll use the following feed ID scheme: > tag:duo.uio.no,2009-09:search?param1=value1;param2=value2 > > To make sure that equivalent searches have the same feed-ID, I remove any > unnecessary parameters (like format=atom) and sort the parameters before > minting the feed ID. > > > > Best Regards, > Are D. Gulbrandsen > The XML-group, > Center for Information Technology Services > University of Oslo > > -- Robert Weber, MBA PO Box 702 Scottsdale, Az USA 85252-0702 Ph: (480) 259-0646 Current project: "hem paz" when translated into Portuguese signifies "in peace" Xhtml Code Example(s): <span style="font-weight:bold;">Hemp Arizona (<a href=" http://hempaz.design.officelive.com"; onclick="java_script:this.target='_blank'">USA</a>)</span> <span style="font-weight:bold;">Clik <a href="http:// https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=7683956"; onclick="java_script:this.target='_blank'">here</a> to make a donation to the Medical Marijuana Initiative (<a href="http://hempaz.com/mmi.aspx"; onclick="java_script:this.target='_blank'">MMI</a>)™</span>
