URL tags/markup

More of a random, nice to know/understand question.

I’m going to get this completely wrong but I guess that’s why I want to know.

I have seen url’s being set as [[*[~id]] or [[~id]] or [[~[[id]] (see I told you this would be interesting)

For example, I want all of my links to start from the root. Similar to adding a "/" in front of all my links. But, from the mess I created above, isn’t there a MODx-specific tag that accomplishes the same thing? Is there advantages to using the MODx-specific method vs. just adding a "/" before my link? example:

Doing /[[~3]] will cause you problems if you ever move the site.

[[~3? &scheme=`abs`]] is a better way.

Or, even better: but a <base href="[[!++site_url]]"></base> tag in the HEAD of your document.

This would be undefined (and a syntax error):



This would just be undefined:



But this would provide a link to the current page (it’s a content field tag nested inside a link tag):



Think of it this way, [[~12]] is a link to the page with the ID 12. [[*id]] will be replaced by the ID of the current page. So if the current page has an ID of 12 and an alias of page12:



[EDITED link for clarity that it generates a URL relative to the site_url]

Thank you both very much!!