Tagging Problems

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Revision as of 17:17, 13 November 2019 by Jirilebl (talk | contribs) (NPL -> OPL, and Keywords -> KEYWORDS in the explanations)
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The OPL uses information embedded in WeBWorK problems as comments. The comments can appear anywhere in the file, although typically they are inserted near the top or at the very bottom of the file.


A typical set of tags are:

## DBsubject(Calculus - single variable)
## DBchapter(Limits and continuity)
## DBsection(Evaluating limits - factoring)
## Level(2)
## KEYWORDS('limits', 'factoring', 'rational function')
## TitleText1(Calculus)
## EditionText1(5e)
## AuthorText1(Stewart)
## Section1(2.9)
## Problem1(22)
## Author(Jeff Holt)
## Institution(UVA)
## Language(en)

Each line is a tag. The structure of a tag must be:

## Tagname(tag value)

starting at the first character of the line, one tag per line. The only exception is Keywords where a comma-separated list of values is allowed. Quotation marks are also not required, except for keywords.

Required Tags

The only required tags are DBsubject, DBchapter, and DBsection. These serve to place the problem in the hierarchical framework of the database. They are essentially a generic textbook, chapter, and section for finding the problem.

Problems should also have a Level. Levels are described in Problem Levels.

By following the link to the hierarchical framework, you can see the values currently in use. If you are tagging problems which don't seem to fit any of the categories which already present, use values which seem appropriate, and then send the problems to John Jones as soon as you can so that the new values can be incorporated into the official listing linked to above.

Optional Tags

Other tags have the following meanings:

  • MO: value is 1 if the problem uses Mathobjects for answer checking, otherwise omit, or set to 0
  • Static: value is 1 if the problem is static, i.e., does not change based on random parameters
  • KEYWORDS: a list of keywords to facilite searching. Keywords themselves should not contain commas or quotation marks. We maintain a list of all keywords currently in use. If you have a keyword which seems to deserve a quotation mark, such as L'Hopital's rule, just omit the quotation marks so it becomes LHopitals rule.
  • TitleText1, EditionText1, AuthorText1, Section1, and Problem1. This is a cross-reference to particular problem(s) in a textbook. The value of Problem1 can be a space separated list of values, as in Problem1("2 3 4"). If you want to cross-reference a WeBWorK problem to more than one text, then use TitleText1 etc. for the first text, TitleText2 etc. for the second text, and so on. In this way, a single .pg file can be cross-referenced to many texts.
  • Language: code from ISO 639.1 for the language in which the problem is written (English, French, German, etc.) If left out, the default is English.
  • Author The name of the problem's author, if you are certain of who wrote the problem.
  • Institution The name of the institution where the problem was written, but only if you are certain of where it was written.