```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>Reconstruction @11:27:33</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>Reconstruction of external auditory canal</item_name>
            <item_key>\\i2b2_PROC\i2b2\Procedures\PRC\ICD9 (Inpatient)\(18-20) Operations on ear\(p18) Operations on external ear\(p18-6) Reconstruction of externa~\</item_key>
            <item_icon>LA</item_icon>
            <tooltip>Procedures \ ICD9 (Inpatient) \ Operations on ear \ Operations on external ear \ Reconstruction of external auditory canal</tooltip>
            <class>ENC</class>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find all patients who have undergone a procedure for the reconstruction of the external auditory canal in the inpatient setting, as defined by the ICD9 (International Classification of Diseases, 9th Revision) code, within any time frame. This query has a specificity scale of 0 and an accuracy scale of 100, indicating a high level of precision. The panel is labeled as 1 and the invert option is set to 0, meaning that the query will return only positive results that match the specified criteria. The hierarchy level of this query is set to 5, and the class is set to ENC (Encounter). This query is focused on a single item, which is the procedure for reconstructing the external auditory canal.