```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns3:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/">
    <query_name>Nutritional def@14:18:24</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>2</hlevel>
            <item_name>Nutritional deficiences</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Nutritional deficiences (260-269)\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Nutritional deficiences</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns3:query_definition>

```

I want to find all instances of nutritional deficiencies (diagnoses code range 260-269) within the i2b2 data repository, regardless of specificity or timing, using the panel number 1 with 100% accuracy and only one occurrence of the item. This query is looking for nutritional deficiencies as a broader category, including any deficiencies in vitamins, minerals, or other essential nutrients. The query is set to be inclusive and not inverted, meaning it will include all instances of nutritional deficiencies, and the tooltip provides a description of the category being searched. The query is built using the ENC (Encoded) classification system.