```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>HGB A1C (LOINC:@20:16:16</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>5</hlevel>
            <item_name>HGB A1C (LOINC:4548-4)</item_name>
            <item_key>\\i2b2_LABS\i2b2\Labtests\LAB\(LLB16) Chemistry\Hemoglobin\GHBA1C\LOINC:4548-4\</item_key>
            <item_icon>LA</item_icon>
            <tooltip>Labtests \ Chemistry \ Hemoglobin \ GHBA1C (Group:GHBA1C) \ Hgb a1c (LOINC:4548-4)</tooltip>
            <class>ENC</class>
            <constrain_by_value>
                <value_operator>GT</value_operator>
                <value_constraint>6</value_constraint>
                <value_unit_of_measure>%</value_unit_of_measure>
                <value_type>NUMBER</value_type>
            </constrain_by_value>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all instances where the Hemoglobin A1C (HgbA1C) lab test result has a value greater than 6%, as indicated by the LOINC code 4548-4, within any timeframe, with a high level of accuracy, and display it in the panel labeled "1" with a total of 1 item occurrence. This query is designed to specifically target the Hemoglobin A1C (HgbA1C) test and its corresponding LOINC code, with no synonyms being used, and the results will be constrained by the specified value and unit of measure.