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moodle/mod/lesson/db/install.xml
Sam Hemelryk 0a4abb7306 mod-lesson MDL-21006 Huge refactoring of the lesson code 
The following are notable changes made in this commit
* Lesson page type are now class based and extend an abstract class. This includes a class for the page type and a class for the creating/editing a instance of this page.
* Converted all forms to mforms
* Action script located in mod/action/* were worked into the above so far less switch statements and the action directory will be removed.
* Implements a custom renderer
* Converted everything to use page, output, and custom renderer methods
* Replaced all deprecated methods incl. print_textarea conversions
* Tried to cut down on excessive DB calls.
Things worth noting:
* The focus of this patch was on cleaning up the module not rewriting it, as such I have organized NOT rewritten. There are still many areas in the module where the code could be greatly improved however to do so would require a rethink/rewrite
2009-12-16 02:00:48 +00:00

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<?xml version="1.0" encoding="UTF-8" ?>
<XMLDB PATH="mod/lesson/db" VERSION="20091208" COMMENT="XMLDB file for Moodle mod/lesson"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="../../../lib/xmldb/xmldb.xsd"
>
<TABLES>
<TABLE NAME="lesson" COMMENT="Defines lesson" NEXT="lesson_pages">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="course"/>
<FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="name"/>
<FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" PREVIOUS="course" NEXT="practice"/>
<FIELD NAME="practice" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="name" NEXT="modattempts"/>
<FIELD NAME="modattempts" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="practice" NEXT="usepassword"/>
<FIELD NAME="usepassword" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="modattempts" NEXT="password"/>
<FIELD NAME="password" TYPE="char" LENGTH="32" NOTNULL="true" SEQUENCE="false" PREVIOUS="usepassword" NEXT="dependency"/>
<FIELD NAME="dependency" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="password" NEXT="conditions"/>
<FIELD NAME="conditions" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" PREVIOUS="dependency" NEXT="grade"/>
<FIELD NAME="grade" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" PREVIOUS="conditions" NEXT="custom"/>
<FIELD NAME="custom" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="grade" NEXT="ongoing"/>
<FIELD NAME="ongoing" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="custom" NEXT="usemaxgrade"/>
<FIELD NAME="usemaxgrade" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" PREVIOUS="ongoing" NEXT="maxanswers"/>
<FIELD NAME="maxanswers" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="4" SEQUENCE="false" PREVIOUS="usemaxgrade" NEXT="maxattempts"/>
<FIELD NAME="maxattempts" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="5" SEQUENCE="false" PREVIOUS="maxanswers" NEXT="review"/>
<FIELD NAME="review" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="maxattempts" NEXT="nextpagedefault"/>
<FIELD NAME="nextpagedefault" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="review" NEXT="feedback"/>
<FIELD NAME="feedback" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" PREVIOUS="nextpagedefault" NEXT="minquestions"/>
<FIELD NAME="minquestions" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="feedback" NEXT="maxpages"/>
<FIELD NAME="maxpages" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="minquestions" NEXT="timed"/>
<FIELD NAME="timed" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="maxpages" NEXT="maxtime"/>
<FIELD NAME="maxtime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="timed" NEXT="retake"/>
<FIELD NAME="retake" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" PREVIOUS="maxtime" NEXT="activitylink"/>
<FIELD NAME="activitylink" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="retake" NEXT="mediafile"/>
<FIELD NAME="mediafile" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" PREVIOUS="activitylink" NEXT="mediaheight"/>
<FIELD NAME="mediaheight" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="100" SEQUENCE="false" PREVIOUS="mediafile" NEXT="mediawidth"/>
<FIELD NAME="mediawidth" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="650" SEQUENCE="false" PREVIOUS="mediaheight" NEXT="mediaclose"/>
<FIELD NAME="mediaclose" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="mediawidth" NEXT="slideshow"/>
<FIELD NAME="slideshow" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="mediaclose" NEXT="width"/>
<FIELD NAME="width" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="640" SEQUENCE="false" PREVIOUS="slideshow" NEXT="height"/>
<FIELD NAME="height" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="480" SEQUENCE="false" PREVIOUS="width" NEXT="bgcolor"/>
<FIELD NAME="bgcolor" TYPE="char" LENGTH="7" NOTNULL="true" DEFAULT="#FFFFFF" SEQUENCE="false" PREVIOUS="height" NEXT="displayleft"/>
<FIELD NAME="displayleft" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="bgcolor" NEXT="displayleftif"/>
<FIELD NAME="displayleftif" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="displayleft" NEXT="progressbar"/>
<FIELD NAME="progressbar" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="displayleftif" NEXT="highscores"/>
<FIELD NAME="highscores" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="progressbar" NEXT="maxhighscores"/>
<FIELD NAME="maxhighscores" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="highscores" NEXT="available"/>
<FIELD NAME="available" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="maxhighscores" NEXT="deadline"/>
<FIELD NAME="deadline" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="available" NEXT="timemodified"/>
<FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="deadline"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id"/>
</KEYS>
<INDEXES>
<INDEX NAME="course" UNIQUE="false" FIELDS="course"/>
</INDEXES>
</TABLE>
<TABLE NAME="lesson_pages" COMMENT="Defines lesson_pages" PREVIOUS="lesson" NEXT="lesson_answers">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="prevpageid"/>
<FIELD NAME="prevpageid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="nextpageid"/>
<FIELD NAME="nextpageid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="prevpageid" NEXT="qtype"/>
<FIELD NAME="qtype" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="nextpageid" NEXT="qoption"/>
<FIELD NAME="qoption" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="qtype" NEXT="layout"/>
<FIELD NAME="layout" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" PREVIOUS="qoption" NEXT="display"/>
<FIELD NAME="display" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="1" SEQUENCE="false" PREVIOUS="layout" NEXT="timecreated"/>
<FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="display" NEXT="timemodified"/>
<FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="timecreated" NEXT="title"/>
<FIELD NAME="title" TYPE="char" LENGTH="255" NOTNULL="true" SEQUENCE="false" PREVIOUS="timemodified" NEXT="contents"/>
<FIELD NAME="contents" TYPE="text" LENGTH="small" NOTNULL="true" SEQUENCE="false" PREVIOUS="title"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary"/>
</KEYS>
</TABLE>
<TABLE NAME="lesson_answers" COMMENT="Defines lesson_answers" PREVIOUS="lesson_pages" NEXT="lesson_attempts">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="pageid"/>
<FIELD NAME="pageid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="jumpto"/>
<FIELD NAME="jumpto" TYPE="int" LENGTH="11" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" PREVIOUS="pageid" NEXT="grade"/>
<FIELD NAME="grade" TYPE="int" LENGTH="4" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" PREVIOUS="jumpto" NEXT="score"/>
<FIELD NAME="score" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="false" DEFAULT="0" SEQUENCE="false" PREVIOUS="grade" NEXT="flags"/>
<FIELD NAME="flags" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="score" NEXT="timecreated"/>
<FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="flags" NEXT="timemodified"/>
<FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="timecreated" NEXT="answer"/>
<FIELD NAME="answer" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" PREVIOUS="timemodified" NEXT="response"/>
<FIELD NAME="response" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" PREVIOUS="answer"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary" NEXT="pageid"/>
<KEY NAME="pageid" TYPE="foreign" FIELDS="pageid" REFTABLE="lesson_pages" REFFIELDS="id" PREVIOUS="lessonid"/>
</KEYS>
</TABLE>
<TABLE NAME="lesson_attempts" COMMENT="Defines lesson_attempts" PREVIOUS="lesson_answers" NEXT="lesson_grades">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="pageid"/>
<FIELD NAME="pageid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="userid"/>
<FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="pageid" NEXT="answerid"/>
<FIELD NAME="answerid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="userid" NEXT="retry"/>
<FIELD NAME="retry" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="answerid" NEXT="correct"/>
<FIELD NAME="correct" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="retry" NEXT="useranswer"/>
<FIELD NAME="useranswer" TYPE="text" LENGTH="small" NOTNULL="false" SEQUENCE="false" PREVIOUS="correct" NEXT="timeseen"/>
<FIELD NAME="timeseen" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="useranswer"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary" NEXT="pageid"/>
<KEY NAME="pageid" TYPE="foreign" FIELDS="pageid" REFTABLE="lesson_pages" REFFIELDS="id" PREVIOUS="lessonid" NEXT="answerid"/>
<KEY NAME="answerid" TYPE="foreign" FIELDS="answerid" REFTABLE="lesson_answers" REFFIELDS="id" PREVIOUS="pageid"/>
</KEYS>
<INDEXES>
<INDEX NAME="userid" UNIQUE="false" FIELDS="userid"/>
</INDEXES>
</TABLE>
<TABLE NAME="lesson_grades" COMMENT="Defines lesson_grades" PREVIOUS="lesson_attempts" NEXT="lesson_timer">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="userid"/>
<FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="grade"/>
<FIELD NAME="grade" TYPE="float" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="userid" NEXT="late"/>
<FIELD NAME="late" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="grade" NEXT="completed"/>
<FIELD NAME="completed" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="late"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary"/>
</KEYS>
<INDEXES>
<INDEX NAME="userid" UNIQUE="false" FIELDS="userid"/>
</INDEXES>
</TABLE>
<TABLE NAME="lesson_timer" COMMENT="lesson timer for each lesson" PREVIOUS="lesson_grades" NEXT="lesson_branch">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="userid"/>
<FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="starttime"/>
<FIELD NAME="starttime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="userid" NEXT="lessontime"/>
<FIELD NAME="lessontime" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="starttime"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary"/>
</KEYS>
<INDEXES>
<INDEX NAME="userid" UNIQUE="false" FIELDS="userid"/>
</INDEXES>
</TABLE>
<TABLE NAME="lesson_branch" COMMENT="branches for each lesson/user" PREVIOUS="lesson_timer" NEXT="lesson_high_scores">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="userid"/>
<FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="pageid"/>
<FIELD NAME="pageid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="userid" NEXT="retry"/>
<FIELD NAME="retry" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="pageid" NEXT="flag"/>
<FIELD NAME="flag" TYPE="int" LENGTH="3" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="retry" NEXT="timeseen"/>
<FIELD NAME="timeseen" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="flag"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary" NEXT="pageid"/>
<KEY NAME="pageid" TYPE="foreign" FIELDS="pageid" REFTABLE="lesson_pages" REFFIELDS="id" PREVIOUS="lessonid"/>
</KEYS>
<INDEXES>
<INDEX NAME="userid" UNIQUE="false" FIELDS="userid"/>
</INDEXES>
</TABLE>
<TABLE NAME="lesson_high_scores" COMMENT="high scores for each lesson" PREVIOUS="lesson_branch">
<FIELDS>
<FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="lessonid"/>
<FIELD NAME="lessonid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="id" NEXT="userid"/>
<FIELD NAME="userid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="lessonid" NEXT="gradeid"/>
<FIELD NAME="gradeid" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" PREVIOUS="userid" NEXT="nickname"/>
<FIELD NAME="nickname" TYPE="char" LENGTH="5" NOTNULL="true" SEQUENCE="false" PREVIOUS="gradeid"/>
</FIELDS>
<KEYS>
<KEY NAME="primary" TYPE="primary" FIELDS="id" NEXT="lessonid"/>
<KEY NAME="lessonid" TYPE="foreign" FIELDS="lessonid" REFTABLE="lesson" REFFIELDS="id" PREVIOUS="primary"/>
</KEYS>
<INDEXES>
<INDEX NAME="userid" UNIQUE="false" FIELDS="userid"/>
</INDEXES>
</TABLE>
</TABLES>
</XMLDB>
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