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The styling of internal and external links is different, and Wagn treats anything with a complete web address (beginning with http) as external.
To make these links so that Wagn recognizes them as internal, just skip the first part of the address. For example you'd edit http://wagn.org/search/fruit down to just/search/fruit — so [[/wagn/search/fruit|search for fruit]] ends up looking like [[/wagn/search/fruit|search for fruit]].
adding a "file ending"extension" to a card's name can return a variety of [[file formats]], for exampleL:example: http://www.wagn.org/wagn/web_address_for_everything+Tips.txt

Cards can be referred to by their numerical ID as well as by a name (this is helpful sometimes when troubleshooting). On any page, you can find the main card's ID number by viewingadding source?view=id. then searching for 'div id="main"' and then in that tag, '"cardId"="|number|"'. Once you have the ID, you can construct addresses such as "/card/view/1031","/~1031", "/card/edit/1031","/~1031?view=edit", etc.

Some of these can be powerfully combined by using [[inclusions]] inside of links, especially with [[contextual names]]. (Note that you will want to use the"core" naked[[view]] [[views]] in such cases, to avoid unwanted HTML that otherwise goes before and after inclusions.) Also see [[contextual web addresses]].