On Fri, 30 Jun 2000, Shane Hathaway wrote:
Also remember you can play tricks with acquisition. If you have a "default" style and a "lowres" style, you can set up your directories like this:
/home /lowres /content
"lowres" and "content" are both children of "home". The default style elements are in home. When the user browses to /home/content/index_html, they get the default style. When the user visits /home/lowres/content/index_html, they get the lowres style.
This is, actually, not quite right. Given the following hierarchy: /home header footer /content index_html /lowres header footer and a request of /home/content/index_html, we have the following acquisition path (assuming index_html is a DTML Method): /home/content = (content of home) /home/content/index_html = (index_html of (content of home)) Assuming index_html contains: <dtml-var header> Content. <dtml-var footer> when index_html asks for header, the acquisition path is searched from left to right; the content folder is searched first, followed by the home folder, where header is found. Now, with a request of /home/lowres/content/index_html, we have: /home/lowres = (lowres of home) /home/lowres/content = ((content of home) of (lowres of home)) /home/lowres/content/index_html = (index_html of ((content of home) of (lowres of home))) Therefore, when index_html looks for header, the content folder is searched, then the home folder, then the lowres folder, then the home folder. Unfortunately, for our example, the header is found in the search of the home folder, and we never make it to the lowres folder. If, instead, we structure the request as /home/content/lowres/index_html, we have: /home/content = (content of home) /home/content/lowres = ((lowres of home) of (content of home)) /home/content/lowres/index_html = (index_html of ((lowres of home) of (content of home))) When index_html looks for header, we search lowres, then home, then content, then home. The header is picked up from lowres, which is what we want. Hope this makes sense. Acquisition is not one of the things I have become good at explaining, yet. The slides from Jim's Acquisition Algebra talk is about the best source of information on this subject.
Shane
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