{{DataTiddler.getData
("Tiddler","variable")}}.thisisalwaysthesame.com/
is not the correct syntax for contructing an evaluated parameter
value...
The {{...}} syntax must enclose the entire parameter. In the above
example, you need to retrieve the field value and then also append the
quoted text ".thisisalwaysthesame.com/" (using the javascript "+"
operator) to create a single resulting value, like this:
{{DataTiddler.getData ("Tiddler","variable")
+".thisisalwaysthesame.com/"}}
The reason your erroneous syntax 'sort of worked' is:
First, the {{...}} param was processed, yielding "http://000"; as a
parameter value. Next, the remaining ".thisisalwaysthesame.com/" was
treated as an additional parameter for the
<<LaunchApplicationButton ...>> macro. The macro then joined the two
parameter values together into a single space-separated string, which
it passed on to the specified application. As you surmised, "%20" is
the hexadecimal code for SPACE.
enjoy,
-e
Eric Shulman
TiddlyTools / ELS Design Studios
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