View of /trunk/webwork2/conf/global.conf.dist

    1 #!perl
    2 ################################################################################
    3 # WeBWorK Online Homework Delivery System
    4 # Copyright © 2000-2003 The WeBWorK Project, http://openwebwork.sf.net/
    5 # $CVSHeader: webwork2/conf/global.conf.dist,v 1.88 2004/07/12 02:30:21 sh002i Exp $
    6 #
    7 # This program is free software; you can redistribute it and/or modify it under
    8 # the terms of either: (a) the GNU General Public License as published by the
    9 # Free Software Foundation; either version 2, or (at your option) any later
   10 # version, or (b) the "Artistic License" which comes with this package.
   11 #
   12 # This program is distributed in the hope that it will be useful, but WITHOUT
   13 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   14 # FOR A PARTICULAR PURPOSE.  See either the GNU General Public License or the
   15 # Artistic License for more details.
   16 ################################################################################
   17 
   18 # This file is used to set up the default WeBWorK course environment for all
   19 # requests. Values may be overwritten by the course.conf for a specific course.
   20 # All package variables set in this file are added to the course environment.
   21 # If you wish to set a variable here but omit it from the course environment,
   22 # use the "my" keyword. The following variables are set in the WeBWorK Apache
   23 # configuration file (webwork.apache-config) and available for use here:
   24 #
   25 #     $webwork_url            The base URL handled by Apache::WeBWorK.
   26 #     $webwork_dir            The path to the base webwork2 directory.
   27 #     $pg_dir                 The path to the base pg directory.
   28 #
   29 #     $webwork_htdocs_url     The base URL of the WeBWorK htdocs directory.
   30 #     $webwork_htdocs_dir     The path to the WeBWorK htdocs directory.
   31 #
   32 #     $webwork_courses_url    The base URL of the WeBWorK courses directory.
   33 #     $webwork_courses_dir    The path to the WeBWorK courses directory.
   34 #
   35 # In addition, the $courseName variable holds the name of the current course.
   36 
   37 ################################################################################
   38 # System-wide locations (directories and URLs)
   39 ################################################################################
   40 
   41 # The root directory, set by webwork_root variable in Apache configuration.
   42 $webworkDirs{root}          = "$webwork_dir";
   43 
   44 # Location of system-wide data files.
   45 $webworkDirs{DATA}          = "$webworkDirs{root}/DATA";
   46 
   47 # Used for temporary storage of uploaded files.
   48 $webworkDirs{uploadCache}   = "$webworkDirs{DATA}/uploads";
   49 
   50 # Location of utility programs.
   51 $webworkDirs{bin}           = "$webworkDirs{root}/bin";
   52 
   53 # Location of configuration files, templates, snippets, etc.
   54 $webworkDirs{conf}          = "$webworkDirs{root}/conf";
   55 
   56 # Location of course directories.
   57 $webworkDirs{courses}       = "$webwork_courses_dir" || "$webworkDirs{root}/courses";
   58 
   59 # Contains log files.
   60 $webworkDirs{logs}          = "$webworkDirs{root}/logs";
   61 
   62 # Contains non-web-accessible temporary files, such as TeX working directories.
   63 $webworkDirs{tmp}           = "$webworkDirs{root}/tmp";
   64 
   65 ##### The following locations are web-accessible.
   66 
   67 # The root URL (usually /webwork2), set by <Location> in Apache configuration.
   68 $webworkURLs{root}          = "$webwork_url";
   69 
   70 # Location of system-wide web-accessible files, such as equation images, and
   71 # help files.
   72 $webworkDirs{htdocs}        = "$webwork_htdocs_dir" || "$webworkDirs{root}/htdocs";
   73 $webworkURLs{htdocs}        = "$webwork_htdocs_url";
   74 
   75 # Location of web-accessible temporary files, such as equation images.
   76 $webworkDirs{htdocs_temp}   = "$webworkDirs{htdocs}/tmp";
   77 $webworkURLs{htdocs_temp}   = "$webworkURLs{htdocs}/tmp";
   78 
   79 # Location of cached equation images.
   80 $webworkDirs{equationCache} = "$webworkDirs{htdocs_temp}/equations";
   81 $webworkURLs{equationCache} = "$webworkURLs{htdocs_temp}/equations";
   82 
   83 # Contains context-sensitive help files.
   84 $webworkDirs{local_help}    = "$webworkDirs{htdocs}/helpFiles";
   85 $webworkURLs{local_help}    = "$webworkURLs{htdocs}/helpFiles";
   86 
   87 # URL of general WeBWorK documentation.
   88 $webworkURLs{docs}          = "http://webhost.math.rochester.edu/webworkdocs/docs";
   89 
   90 # URL of WeBWorK 1.x profLogin.pl script, for access to old professor pages.
   91 # Note that both systems must share a single "courses" directory for this to be
   92 # useful. Leave this blank to disable
   93 $webworkURLs{oldProf}       = "/webwork1/profLogin.pl";
   94 
   95 # URL of WeBWorK Bugzilla database.
   96 $webworkURLs{bugReporter}   = "http://bugs.webwork.rochester.edu/enter_bug.cgi?product=WeBWorK%20mod_perl";
   97 
   98 # Location of jsMath script, used for the jsMath display mode.
   99 $webworkURLs{jsMath}        = "$webworkURLs{htdocs}/jsMath/jsMath.js";
  100 
  101 # Location of ASCIIMathML script, used for the asciimath display mode.
  102 $webworkURLs{asciimath}     = "$webworkURLs{htdocs}/ASCIIMathML/ASCIIMathML.js";
  103 
  104 ################################################################################
  105 # Defaults for course-specific locations (directories and URLs)
  106 ################################################################################
  107 
  108 # The root directory of the current course. (The ID of the current course is
  109 # available in $courseName.)
  110 $courseDirs{root}        = "$webworkDirs{courses}/$courseName";
  111 
  112 # Location of course-specific data files, such as WW1 (GDBM) database files.
  113 $courseDirs{DATA}        = "$courseDirs{root}/DATA";
  114 
  115 # Location of authentication data files when using a WW1 (GDBM) database.
  116 $courseDirs{auth_DATA}   = "$courseDirs{DATA}/.auth";
  117 
  118 # Location of course HTML files, passed to PG.
  119 $courseDirs{html}        = "$courseDirs{root}/html";
  120 $courseURLs{html}        = "$webwork_courses_url/$courseName";
  121 
  122 # Location of course image files, passed to PG.
  123 $courseDirs{html_images} = "$courseDirs{html}/images";
  124 
  125 # Location of web-accessible, course-specific temporary files, like static and
  126 # dynamically-generated PG graphics.
  127 $courseDirs{html_temp}   = "$courseDirs{html}/tmp";
  128 $courseURLs{html_temp}   = "$courseURLs{html}/tmp";
  129 
  130 # Location of course-specific logs, like the transaction log.
  131 $courseDirs{logs}        = "$courseDirs{root}/logs";
  132 
  133 # Location of scoring files.
  134 $courseDirs{scoring}     = "$courseDirs{root}/scoring";
  135 
  136 # Location of PG templates and set definition files.
  137 $courseDirs{templates}   = "$courseDirs{root}/templates";
  138 
  139 # Location of course-specific macro files.
  140 $courseDirs{macros}      = "$courseDirs{templates}/macros";
  141 
  142 # Location of mail-merge templates.
  143 $courseDirs{email}       = "$courseDirs{templates}/email";
  144 
  145 ################################################################################
  146 # System-wide files
  147 ################################################################################
  148 
  149 # Location of this file.
  150 $webworkFiles{environment}                      = "$webworkDirs{conf}/global.conf";
  151 
  152 # Flat-file database used to protect against MD5 hash collisions. TeX equations
  153 # are hashed to determine the name of the image file. There is a tiny chance of
  154 # a collision between two TeX strings. This file allows for that. However, this
  155 # is slow, so most people chose not to worry about it. Set this to "" if you
  156 # don't want to use the equation cache file.
  157 $webworkFiles{equationCacheDB}                  = ""; # "$webworkDirs{DATA}/equationcache";
  158 
  159 ##### Hardcopy snippets are used in constructing a TeX file for hardcopy output.
  160 ##### They should contain TeX code unless otherwise noted.
  161 
  162 # The preamble is the first thing in the TeX file.
  163 $webworkFiles{hardcopySnippets}{preamble}       = "$webworkDirs{conf}/snippets/hardcopyPreamble.tex";
  164 
  165 # The setHeader preceeds each set. It is a PG file.
  166 $webworkFiles{hardcopySnippets}{setHeader}      = "$webworkDirs{conf}/snippets/setHeader.pg";  # hardcopySetHeader.pg",
  167 
  168 # The problem divider goes between problems.
  169 $webworkFiles{hardcopySnippets}{problemDivider} = "$webworkDirs{conf}/snippets/hardcopyProblemDivider.tex";
  170 
  171 # The set footer goes after each set. Is is a PG file.
  172 $webworkFiles{hardcopySnippets}{setFooter}      = "$webworkDirs{conf}/snippets/hardcopySetFooter.pg";
  173 
  174 # The set divider goes between sets (in multiset output).
  175 $webworkFiles{hardcopySnippets}{setDivider}     = "$webworkDirs{conf}/snippets/hardcopySetDivider.tex";
  176 
  177 # The user divider does between users (in multiuser output).
  178 $webworkFiles{hardcopySnippets}{userDivider}    = "$webworkDirs{conf}/snippets/hardcopyUserDivider.tex";
  179 
  180 # The postabmle is the last thing in the TeX file.
  181 $webworkFiles{hardcopySnippets}{postamble}      = "$webworkDirs{conf}/snippets/hardcopyPostamble.tex";
  182 
  183 ##### Screen snippets are used when displaying problem sets on the screen.
  184 
  185 # The set header is displayed on the problem set page. It is a PG file.
  186 $webworkFiles{screenSnippets}{setHeader}        = "$webworkDirs{conf}/snippets/setHeader.pg"; # screenSetHeader.pg"
  187 
  188 ################################################################################
  189 # Course-specific files
  190 ################################################################################
  191 
  192 # The course configuration file.
  193 $courseFiles{environment} = "$courseDirs{root}/course.conf";
  194 
  195 # File contents are displayed after login, on the problem sets page. Path given
  196 # here is relative to the templates directory.
  197 $courseFiles{course_info} = "course_info.txt";
  198 
  199 # File contents are displayed on the login page. Path given here is relative to
  200 # the templates directory.
  201 $courseFiles{login_info}  = "login_info.txt";
  202 
  203 # Additional library buttons can be added to the Library Browser (SetMaker.pm)
  204 # by adding the libraries you want to the following line.  For each key=>value
  205 # in the list, if a directory (or link to a directory) with name 'key' appears
  206 # in the templates directory, then a button with name 'value' will be placed at
  207 # the top of the problem browser.  (No button will appear if there is no
  208 # directory or link with the given name in the templates directory.)  For
  209 # example,
  210 #
  211 #     $courseFiles{problibs} = {rochester => "Rochester", asu => "ASU"};
  212 #
  213 # would add two buttons, one for the Rochester library and one for the ASU
  214 # library, provided templates/rochester and templates/asu exists.
  215 #
  216 $courseFiles{problibs}    = {};
  217 
  218 ################################################################################
  219 # Logs
  220 ################################################################################
  221 
  222 # FIXME: take logs out of %webworkFiles/%courseFiles and give them their own
  223 # top-level hash.
  224 
  225 # Logs data about how long it takes to process problems. (Do not confuse this
  226 # with the /other/ timing log which can be set by WeBWorK::Timing and is used
  227 # for benchmarking system performance in general. At some point, this timing
  228 # mechanism will be deprecated in favor of the WeBWorK::Timing mechanism.)
  229 $webworkFiles{logs}{timing}         = "$webworkDirs{logs}/timing.log";
  230 
  231 # The transaction log contains data from each recorded answer submission. This
  232 # is useful if the database becomes corrupted.
  233 $webworkFiles{logs}{transaction}    = "$courseDirs{logs}/transaction.log";
  234 
  235 # The answer log stores a history of all users' submitted answers.
  236 $courseFiles{logs}{answer_log}      = "$courseDirs{logs}/answer_log";
  237 
  238 ################################################################################
  239 # Mail settings
  240 ################################################################################
  241 
  242 # Mail sent by the PG system and the mail merge and feedback modules will be
  243 # sent via this SMTP server.
  244 $mail{smtpServer}            = 'mail.yourschool.edu';
  245 
  246 # When connecting to the above server, WeBWorK will send this address in the
  247 # MAIL FROM command. This has nothing to do with the "From" address on the mail
  248 # message. It can really be anything, but some mail servers require it contain
  249 # a valid mail domain, or at least be well-formed.
  250 $mail{smtpSender}            = 'webwork@yourserver.yourschool.edu';
  251 
  252 # AllowedRecipients defines addresses that the PG system is allowed to send mail
  253 # to. this prevents subtle PG exploits. This should be set in course.conf to the
  254 # addresses of professors of each course. Sending mail from the PG system (i.e.
  255 # questionaires, essay questions) will fail if this is not set somewhere (either
  256 # here or in course.conf).
  257 $mail{allowedRecipients}     = [
  258   #'prof1@yourserver.yourdomain.edu',
  259   #'prof2@yourserver.yourdomain.edu',
  260 ];
  261 
  262 # If defined, feedbackRecipients overrides the list of recipients for feedback
  263 # email. It's appropriate to set this in the course.conf for specific courses,
  264 # but probably not in global.conf. if not defined, mail is sent to all
  265 # professors and TAs for a given course
  266 $mail{feedbackRecipients}    = [
  267   #'prof1@yourserver.yourdomain.edu',
  268   #'prof2@yourserver.yourdomain.edu',
  269 ];
  270 
  271 # feedbackVerbosity:
  272 #  0: send only the feedback comment and context link
  273 #  1: as in 0, plus user, set, problem, and PG data
  274 #  2: as in 1, plus the problem environment (debugging data)
  275 $mail{feedbackVerbosity}     = 1;
  276 
  277 # Defines the size of the Mail Merge editor window
  278 # FIXME: should this be here? it's UI, not mail
  279 # FIXME: replace this with the auto-size method that TWiki uses
  280 $mail{editor_window_rows}    = 15;
  281 $mail{editor_window_columns} = 100;
  282 
  283 ################################################################################
  284 # Paths to external programs
  285 ################################################################################
  286 
  287 $externalPrograms{mkdir}    = "/bin/mkdir";
  288 $externalPrograms{mysql}    = "/usr/local/bin/mysql";
  289 
  290 $externalPrograms{latex}    = "/usr/local/bin/latex";
  291 $externalPrograms{pdflatex} = "/usr/local/bin/pdflatex";
  292 $externalPrograms{dvipng}   = "/usr/local/bin/dvipng";
  293 $externalPrograms{tth}      = "/usr/local/bin/tth";
  294 
  295 # These image conversion utilities are included in the WeBWorK distribution.
  296 $externalPrograms{gif2eps}  = "$webworkDirs{bin}/gif2eps";
  297 $externalPrograms{png2eps}  = "$webworkDirs{bin}/png2eps";
  298 $externalPrograms{gif2png}  = "$webworkDirs{bin}/gif2png";
  299 
  300 ################################################################################
  301 # Site defaults (FIXME: what other things could be "site defaults"?)
  302 ################################################################################
  303 
  304 # Status strings -- lists valid status values and their names. If your site uses
  305 # additional values, add them here.
  306 $siteDefaults{status} = {
  307   A        => "Audit",
  308   audit    => "Audit",
  309   D        => "Drop",
  310   drop     => "Drop",
  311   withdraw => "Drop",
  312   C        => "Enrolled",
  313   current  => "Enrolled",
  314   enrolled => "Enrolled",
  315 };
  316 
  317 ################################################################################
  318 # Frontend options
  319 ################################################################################
  320 
  321 %templates = (
  322   system => "$webworkDirs{conf}/templates/ur.template",
  323 );
  324 
  325 ################################################################################
  326 # Database options
  327 ################################################################################
  328 
  329 # Several database are defined in the file conf/database.conf and stored in the
  330 # hash %dbLayouts.
  331 include "conf/database.conf";
  332 
  333 # Select the default database layout. This can be overridden in the course.conf
  334 # file of a particular course. If you choose "gdbm", WeBWorK will be able to
  335 # use courses from WeBWorK 1 without first adding course.conf files to them.
  336 # However, the recommended database layout for new courses is "sql". This can
  337 # be set when creating a course.
  338 $dbLayoutName = "sql"; # or "gdbm";
  339 
  340 # This sets the symbol "dbLayout" as an alias for the selected database layout.
  341 *dbLayout     = $dbLayouts{$dbLayoutName};
  342 
  343 ################################################################################
  344 # Problem library options
  345 ################################################################################
  346 
  347 # The directory containing the problem library files. Set to "" if no problem
  348 # library is installed.
  349 $problemLibrary{root}        = "";
  350 
  351 # The name of the SQL database containing problem metadata
  352 $problemLibrary{sourceSQL}   = "ProblemLibrary";
  353 
  354 # The user name to use when connecting to the problem library database
  355 $problemLibrary{userSQL}     = "webworkRead";
  356 
  357 # The password to use when connecting to the problem library database
  358 $problemLibrary{passwordSQL} = "";
  359 
  360 ################################################################################
  361 # Authorization system
  362 ################################################################################
  363 
  364 # This lets you specify a minimum permission level needed to perform certain
  365 # actions.  In the current system, >=10 will allow a professor to perform the
  366 # action, >=5 will allow a TA to, and >=0 will allow a student to perform an
  367 # action (almost never what you want).
  368 
  369 my $student   = 0;
  370 my $ta        = 5;
  371 my $professor = 10;
  372 
  373 %permissionLevels = (
  374   report_bugs                    => $student,
  375   view_multiple_sets             => $ta,
  376   view_unopened_sets             => $ta,
  377   view_unpublished_sets          => $ta,
  378   view_answers                   => $ta,
  379   become_student                 => $professor,
  380   access_instructor_tools        => $ta,
  381   create_and_delete_problem_sets => $professor,
  382   modify_problem_sets            => $professor,
  383   assign_problem_sets            => $professor,
  384   modify_student_data            => $professor,
  385   score_sets                     => $professor,
  386   send_mail                      => $professor,
  387   modify_classlist_files         => $professor,
  388   modify_set_def_files           => $professor,
  389   modify_scoring_files           => $professor,
  390   modify_problem_template_files  => $professor,
  391   create_and_delete_courses      => $professor,
  392   fix_course_databases           => $professor,
  393 );
  394 
  395 ################################################################################
  396 # Session options
  397 ################################################################################
  398 
  399 # $sessionKeyTimeout defines seconds of inactivity before a key expires
  400 $sessionKeyTimeout = 60*30;
  401 
  402 # $sessionKeyLength defines the length (in characters) of the session key
  403 $sessionKeyLength = 40;
  404 
  405 # @sessionKeyChars lists the legal session key characters
  406 @sessionKeyChars = ('A'..'Z', 'a'..'z', '0'..'9', '.', '^', '/', '!', '*');
  407 
  408 # Practice users are users who's names start with $practiceUser
  409 # (you can comment this out to remove practice user support)
  410 $practiceUserPrefix = "practice";
  411 
  412 # There is a practice user who can be logged in multiple times.  He's
  413 # commented out by default, though, so you don't hurt yourself.  It is
  414 # kindof a backdoor to the practice user system, since he doesn't have a
  415 # password.  Come to think of it, why do we even have this?!
  416 #$debugPracticeUser = "practice666";
  417 
  418 ################################################################################
  419 # PG subsystem options
  420 ################################################################################
  421 
  422 # List of enabled display modes. Comment out any modes you don't wish to make
  423 # available for use.
  424 $pg{displayModes} = [
  425   "plainText",     # display raw TeX for math expressions
  426   "formattedText", # format math expressions using TtH
  427   "images",        # display math expressions as images generated by dvipng
  428   "jsMath",        # render TeX math expressions on the client side using jsMath
  429   "asciimath",     # render TeX math expressions on the client side using ASCIIMathML
  430 ];
  431 
  432 #### Default settings for the PG translator
  433 
  434 # Default display mode. Should be listed above.
  435 $pg{options}{displayMode}        = "images";
  436 
  437 # The default grader to use, if a problem doesn't specify.
  438 $pg{options}{grader}             = "avg_problem_grader";
  439 
  440 # Fill in answer blanks with the student's last answer by default?
  441 $pg{options}{showOldAnswers}     = 1;
  442 
  443 # Show correct answers (when allowed) by default?
  444 $pg{options}{showCorrectAnswers} = 0;
  445 
  446 # Show hints (when allowed) by default?
  447 $pg{options}{showHints}          = 0;
  448 
  449 # Show solutions (when allowed) by default?
  450 $pg{options}{showSolutions}      = 0;
  451 
  452 # Catch translation warnings internally by default? (We no longer need to do
  453 # this, since there is a global warnings handler. So this should be off.)
  454 $pg{options}{catchWarnings}      = 0;
  455 
  456 ##### Currently-selected renderer
  457 
  458 # Only the local renderer is supported in this version.
  459 $pg{renderer} = "WeBWorK::PG::Local";
  460 
  461 # The remote renderer connects to an XML-RPC PG rendering server.
  462 #$pg{renderer} = "WeBWorK::PG::Remote"'
  463 
  464 ##### Renderer-dependent options
  465 
  466 # The remote renderer has one option:
  467 $pg{renderers}{"WeBWorK::PG::Remote"} = {
  468   # The "proxy" server to connect to for remote rendering.
  469   proxy => "http://localhost:21000/RenderD",
  470 };
  471 
  472 ##### Settings for various display modes
  473 
  474 # "images" mode has several settings:
  475 $pg{displayModeOptions}{images} = {
  476   # Determines the method used to align images in output. Can be
  477   # "baseline", "absmiddle", or "mysql".
  478   dvipng_align => 'baseline',
  479 
  480   # If we choose mysql, we need information on connecting to the
  481   # database. Whatever you use here, you have to create the database
  482   # and grant read/write priveleges to the user listed here. To create
  483   # the database in mysql, as root use:
  484   #
  485   #     CREATE DATABASE DvipngDepths;
  486   #     USE DvipngDepths;
  487   #     CREATE TABLE depths (md5 CHAR(33) NOT NULL, depth SMALLINT, PRIMARY KEY (md5));
  488   #     GRANT ALL ON DvipngDepths.* TO webworkWrite;
  489   #
  490   # In the last statement, "webworkWrite" should match the user below.
  491   dvipng_depth_db => {
  492     dbsource => 'dbi:mysql:DvipngDepths',
  493     user     => $dbLayouts{sql}->{password}->{params}->{usernameRW},
  494     passwd   => $dbLayouts{sql}->{password}->{params}->{passwordRW},
  495   },
  496 };
  497 
  498 ##### Directories used by PG
  499 
  500 # The root of the PG directory tree (from pg_root in Apache config).
  501 $pg{directories}{root}   = "$pg_dir";
  502 $pg{directories}{lib}    = "$pg{directories}{root}/lib";
  503 $pg{directories}{macros} = "$pg{directories}{root}/macros";
  504 
  505 ##### "Special" PG environment variables. (Stuff that doesn't fit in anywhere else.)
  506 
  507 # Users for whom to print the file name of the PG file being processed.
  508 $pg{specialPGEnvironmentVars}{PRINT_FILE_NAMES_FOR} = [ "professor", ];
  509 
  510 # Locations of CAPA resources. (Only necessary if you need to use converted CAPA
  511 # problems.)
  512 $pg{specialPGEnvironmentVars}{CAPA_Tools}             = "$courseDirs{macros}/CAPA_Tools/",
  513 $pg{specialPGEnvironmentVars}{CAPA_MCTools}           = "$courseDirs{macros}/CAPA_MCTools/",
  514 $pg{specialPGEnvironmentVars}{CAPA_GraphicsDirectory} = "$courseDirs{html}/CAPA_Graphics/",
  515 $pg{specialPGEnvironmentVars}{CAPA_Graphics_URL}      = "$courseURLs{html}/CAPA_Graphics/",
  516 
  517 # Size in pixels of dynamically-generated images, i.e. graphs.
  518 $pg{specialPGEnvironmentVars}{onTheFlyImageSize}      = 400,
  519 
  520 ##### PG modules to load
  521 
  522 # The first item of each list is the module to load. The remaining items are
  523 # additional packages to import.
  524 
  525 ${pg}{modules} = [
  526   [qw(DynaLoader)],
  527   [qw(Exporter)],
  528   [qw(GD)],
  529 
  530   [qw(AlgParser AlgParserWithImplicitExpand Expr ExprWithImplicitExpand)],
  531   [qw(AnswerHash AnswerEvaluator)],
  532   [qw(WWPlot)], # required by Circle (and others)
  533   [qw(Circle)],
  534   [qw(Complex)],
  535   [qw(Complex1)],
  536   [qw(Distributions)],
  537   [qw(Fraction)],
  538   [qw(Fun)],
  539   [qw(Hermite)],
  540   [qw(Label)],
  541   [qw(List)],
  542   [qw(Match)],
  543   [qw(MatrixReal1)], # required by Matrix
  544   [qw(Matrix)],
  545   [qw(Multiple)],
  546   [qw(PGrandom)],
  547   [qw(Regression)],
  548   [qw(Select)],
  549   [qw(Units)],
  550   [qw(VectorField)],
  551 ];
  552 
  553 ##### Answer evaluatior defaults
  554 
  555 $pg{ansEvalDefaults} = {
  556   functAbsTolDefault            => .001,
  557   functLLimitDefault            => .0000001,
  558   functMaxConstantOfIntegration => 1E8,
  559   functNumOfPoints              => 3,
  560   functRelPercentTolDefault     => .1,
  561   functULimitDefault            => .9999999,
  562   functVarDefault               => "x",
  563   functZeroLevelDefault         => 1E-14,
  564   functZeroLevelTolDefault      => 1E-12,
  565   numAbsTolDefault              => .001,
  566   numFormatDefault              => "",
  567   numRelPercentTolDefault       => .1,
  568   numZeroLevelDefault           => 1E-14,
  569   numZeroLevelTolDefault        => 1E-12,
  570   useBaseTenLog                 => 0,
  571   defaultDisplayMatrixStyle     => "[s]",
  572 };
  573 
  574 ################################################################################
  575 # Compatibility
  576 ################################################################################
  577 
  578 # Define the old names for the various "root" variables.
  579 $webworkRoot    = $webworkDirs{root};
  580 $webworkURLRoot = $webworkURLs{root};
  581 $pgRoot         = $pg{directories}{root};