Knowls

This shows how to use intervals in a problem.

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Complete Code

Download file: Knowls.pg

PG problem file

Explanation

DOCUMENT();
loadMacros('PGstandard.pl', 'PGML.pl', 'PGcourse.pl');

Preamble

These standard macros need to be loaded. 
BEGIN_PGML
Here is a knowl
[@ knowlLink(
    'click me',
    value => 'This is the inside of a knowl. If you click again, I will go away'
) @]*

Here is a
[@ knowlLink(
    'math knowl',
    value => 'the sine function is \\(\\frac{2}{3}\\)'
) @]*

Here is another knowl
[@ knowlLink(
    'click me',
    url => '/webwork2_files/helpFiles/Entering-Angles.html'
) @]*
END_PGML

ENDDOCUMENT();

Statement

Knowls can be added to a text section of the problem file.

You can specify a value, as in the first example, which gives the text to appear in the knowl.

Math can be included in the text of a knowl as shown in the second example.

You can instead specify a URL for the knowl, as shown in the third example. Note that the URL must be for a file located on the same server. A URL for another server will result in a cross-origin request which will generally be blocked. Generally, this should only be used in local problems to show custom content, and should not be used for problems in the OPL.