<?xml version="1.0" encoding="UTF-8" ?>
<XMLDB PATH="question/type/symbollic/db" VERSION="20080516" COMMENT="XMLDB file for Moodle question/type/algebra">
  <TABLES>
	<TABLE NAME="question_algebra" COMMENT="Options for algebra questions" NEXT="question_algebra_variables">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true"
		       ENUM="false" NEXT="questionid"/>
        <FIELD NAME="questionid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0"
		       SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="compareby"/>
        <FIELD NAME="compareby" TYPE="char" LENGTH="20" NOTNULL="true" UNSIGNED="false" DEFAULT="evaluated"
		       SEQUENCE="false" ENUM="false" PREVIOUS="questionid" NEXT="answers"/>
        <FIELD NAME="answers" TYPE="text" LENGTH="small" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="compareby" NEXT="variables"/>
        <FIELD NAME="variables" TYPE="text" LENGTH="small" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="answers" NEXT="nchecks"/>
        <FIELD NAME="nchecks" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="10"
		       SEQUENCE="false" ENUM="false" PREVIOUS="variables" NEXT="tolerance"/>
        <FIELD NAME="tolerance" TYPE="float" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="nchecks" NEXT="disallow"/>
        <FIELD NAME="disallow" TYPE="text" LENGTH="small" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="tolerance" NEXT="allowedfuncs"/>
        <FIELD NAME="allowedfuncs" TYPE="text" LENGTH="small" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="disallow" NEXT="answerprefix"/>
        <FIELD NAME="answerprefix" TYPE="text" LENGTH="small" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="allowedfuncs"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="questionid"/>
        <KEY NAME="questionid" TYPE="foreign" FIELDS="questionid" REFTABLE="questions" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
	<TABLE NAME="question_algebra_variables" COMMENT="Variables for algebra questions" PREVIOUS="question_algebra">
      <FIELDS>
        <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true"
		       ENUM="false" NEXT="question"/>
        <FIELD NAME="question" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0"
		       SEQUENCE="false" ENUM="false" PREVIOUS="id" NEXT="name"/>
        <FIELD NAME="name" TYPE="char" LENGTH="30" NOTNULL="true" UNSIGNED="false"
		       SEQUENCE="false" ENUM="false" PREVIOUS="question" NEXT="min"/>
        <FIELD NAME="min" TYPE="char" LENGTH="30" NOTNULL="true" UNSIGNED="false" DEFAULT="-"
		       SEQUENCE="false" ENUM="false" PREVIOUS="name" NEXT="max"/>
        <FIELD NAME="max" TYPE="char" LENGTH="30" NOTNULL="true" UNSIGNED="false" DEFAULT="-"
		       SEQUENCE="false" ENUM="false" PREVIOUS="min"/>
      </FIELDS>
      <KEYS>
        <KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="question"/>
        <KEY NAME="question" TYPE="foreign" FIELDS="question" REFTABLE="questions" REFFIELDS="id" PREVIOUS="primary"/>
      </KEYS>
    </TABLE>
  </TABLES>
</XMLDB>

