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   1  <?xml version="1.0" encoding="UTF-8" ?>
   2  <XMLDB PATH="question/type/numerical/db" VERSION="20120122" COMMENT="XMLDB file for Moodle question/type/numerical"
   3      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   4      xsi:noNamespaceSchemaLocation="../../../../lib/xmldb/xmldb.xsd"
   5  >
   6    <TABLES>
   7      <TABLE NAME="question_numerical" COMMENT="Options for numerical questions.">
   8        <FIELDS>
   9          <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
  10          <FIELD NAME="question" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Redundant, because of the answer field. Foreign key references question.id."/>
  11          <FIELD NAME="answer" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Foreign key references question_answers.id."/>
  12          <FIELD NAME="tolerance" TYPE="char" LENGTH="255" NOTNULL="true" DEFAULT="0.0" SEQUENCE="false" COMMENT="Allowed error when matching a response to this answer. I don't know why this is stored as a string."/>
  13        </FIELDS>
  14        <KEYS>
  15          <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
  16          <KEY NAME="question" TYPE="foreign" FIELDS="question" REFTABLE="question" REFFIELDS="id"/>
  17        </KEYS>
  18        <INDEXES>
  19          <INDEX NAME="answer" UNIQUE="false" FIELDS="answer"/>
  20        </INDEXES>
  21      </TABLE>
  22      <TABLE NAME="question_numerical_options" COMMENT="Options for questions of type numerical This table is also used by the calculated question type">
  23        <FIELDS>
  24          <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
  25          <FIELD NAME="question" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
  26          <FIELD NAME="showunits" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="How units are handled: 3) Not used at all, 0) Optional, or 1) must be right or penalty applied."/>
  27          <FIELD NAME="unitsleft" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="display the unit at left as in $1.00"/>
  28          <FIELD NAME="unitgradingtype" TYPE="int" LENGTH="4" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="0 no penalty, 1 fraction response grade, 2 fraction total grade"/>
  29          <FIELD NAME="unitpenalty" TYPE="number" LENGTH="12" NOTNULL="true" DEFAULT="0.1" SEQUENCE="false" DECIMALS="7" COMMENT="Penalty for getting the unit wrong, when they are being graded."/>
  30        </FIELDS>
  31        <KEYS>
  32          <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
  33          <KEY NAME="question" TYPE="foreign" FIELDS="question" REFTABLE="question" REFFIELDS="id"/>
  34        </KEYS>
  35      </TABLE>
  36      <TABLE NAME="question_numerical_units" COMMENT="Optional unit options for numerical questions. This table is also used by the calculated question type.">
  37        <FIELDS>
  38          <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="true"/>
  39          <FIELD NAME="question" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Foreign key references question.id"/>
  40          <FIELD NAME="multiplier" TYPE="number" LENGTH="40" NOTNULL="true" DEFAULT="1.00000000000000000000" SEQUENCE="false" DECIMALS="20" COMMENT="The multiplier for this unit. For example, if the first unit is (1.0, 'cm'), another unit might be (0.1, 'mm') or (100.0, 'm')."/>
  41          <FIELD NAME="unit" TYPE="char" LENGTH="50" NOTNULL="true" SEQUENCE="false" COMMENT="The unit. For example 'm' or 'kg'."/>
  42        </FIELDS>
  43        <KEYS>
  44          <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
  45          <KEY NAME="question" TYPE="foreign" FIELDS="question" REFTABLE="question" REFFIELDS="id"/>
  46        </KEYS>
  47        <INDEXES>
  48          <INDEX NAME="question-unit" UNIQUE="true" FIELDS="question, unit" COMMENT="Unique index to ensure that only one unit with a particular name is created for each question."/>
  49        </INDEXES>
  50      </TABLE>
  51    </TABLES>
  52  </XMLDB>