Group report without repeating group value

Question

I am trying to format my report that breaks by department like this:
Dept ID Employee
1____1___BoB
_____2___Mike
_____3___John
2____4___Tim
I don't want the 'Dept' field to repeat every line. Only where it is changed. I tried this, but ut shows the value on every line.
<xsl:for-each-group select="DOCUMENT/REGION/ROWSET2/ROWSET2_ROW" group-adjacent="GROUP_FIELD"><?DEPARTMENT?>

Answer 1

Thanks Vestrini,
Not sure how to pass you the info. But here is my XML data:
I'm trying to group by "group Field" with Class Code as the value
Class Code Section
1________ 001
_________ 002
_________ 003
2________ 001
<?xml version="1.0" encoding="UTF-8" ?>
- <DOCUMENT>
<DATE>07/28/2009</DATE>
<USER_NAME>BOBM</USER_NAME>
<APP_ID>20080618</APP_ID>
<APP_NAME>SIS Express</APP_NAME>
<TITLE>SXMCLLST</TITLE>
<P507_YEAR>1AD004DBEE904C32B6F6C0D7183BA735</P507_YEAR>
<P507_REPORT_ORDER>CLASS_CODE</P507_REPORT_ORDER>
<P507_REPORT_ORDER2>SECTION</P507_REPORT_ORDER2>
<P507_REPORT_ORDER3>SUB_SECTION</P507_REPORT_ORDER3>
<P507_REPORT_ORDER4>%25null%25</P507_REPORT_ORDER4>
<P507_OWNER>SIS_EXPRESS</P507_OWNER>
<P507_DISPLAY_YEAR>2008-2009</P507_DISPLAY_YEAR>
<P507_DISPLAY_REPORT_NAME>Master Class List</P507_DISPLAY_REPORT_NAME>
<P507_APP_USER>BOBM</P507_APP_USER>
<P507_RESIDES_ONLY>Y</P507_RESIDES_ONLY>
<P507_BURST_REPORT>N</P507_BURST_REPORT>
<P507_RECEIVES_FLAGS>NONE</P507_RECEIVES_FLAGS>
- <REGION ID="8121015876765067">
- <ROWSET1>
- <ROWSET1_ROW>
<STUDENT_ID_LABEL>ID#:</STUDENT_ID_LABEL>
<GRADE_LEVEL_LABEL>Grade:</GRADE_LEVEL_LABEL>
<HOMEROOM_LABEL>Homeroom:</HOMEROOM_LABEL>
<COUNSELOR_LABEL>Counselor:</COUNSELOR_LABEL>
<PERIOD_LABEL>Period</PERIOD_LABEL>
<SEMESTER_LABEL>Semester</SEMESTER_LABEL>
<COURSE_CODE_LABEL>Course Code</COURSE_CODE_LABEL>
<SECTION_LABEL>Section</SECTION_LABEL>
<COURSE_NAME_LABEL>Name</COURSE_NAME_LABEL>
<ROOM_LABEL>Room</ROOM_LABEL>
<DAYS_LABEL>Days</DAYS_LABEL>
<TEACHER_LABEL>Teacher</TEACHER_LABEL>
</ROWSET1_ROW>
</ROWSET1>
- <ROWSET2>
- <ROWSET2_ROW>
<GROUP_FIELD>AA2CFC5A31484DE281AD08D538DAF9DB</GROUP_FIELD>
<CLASS_CODE>108CHS</CLASS_CODE>
<SECTION>001</SECTION>
<NAME>English 9 (Honors)</NAME>
<SUB_SECTION>001</SUB_SECTION>
<PERIOD>01</PERIOD>
<SEMESTER>FY</SEMESTER>
<DAYS>MTWRF</DAYS>
<ROOM />
<STAFF_NAME />
<DEPARTMENT>ENG</DEPARTMENT>
</ROWSET2_ROW>
- <ROWSET2_ROW>
<GROUP_FIELD>5AA81E923C924197A57E0426007D7C01</GROUP_FIELD>
<CLASS_CODE>109CHS</CLASS_CODE>
<SECTION>001</SECTION>
<NAME>English 9</NAME>
<SUB_SECTION />
<PERIOD />
<SEMESTER />
<DAYS />
<ROOM />
<STAFF_NAME />
<DEPARTMENT>ENG</DEPARTMENT>
</ROWSET2_ROW>
</ROWSET2>
</REGION>
</DOCUMENT>