```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>Chronic obstructive asthma@14:52:31</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>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Admit Diagnosis</modifier_name>
                <modifier_key>\\i2b2_DIAG\Admit Diagnosis\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Mild</modifier_name>
                <modifier_key>\\i2b2_DIAG\Severity\Mild\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Moderate</modifier_name>
                <modifier_key>\\i2b2_DIAG\Severity\Moderate\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Moderate to severe</modifier_name>
                <modifier_key>\\i2b2_DIAG\Severity\Moderate To Severe\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Principal Diagnosis</modifier_name>
                <modifier_key>\\i2b2_DIAG\Principal Diagnosis\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Mild to moderate</modifier_name>
                <modifier_key>\\i2b2_DIAG\Severity\Mild To Mod\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
        <item>
            <hlevel>1</hlevel>
            <item_name>Chronic obstructive asthma</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Respiratory system (460-519)\Chronic obstructive diseases (490-496)\(493) Asthma\(493-2) Chronic obstructive asthma\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Respiratory system \ Chronic obstructive diseases \ Asthma \ Chronic obstructive asthma</tooltip>
            <class>ENC</class>
            <constrain_by_modifier>
                <modifier_name>Secondary Diagnosis</modifier_name>
                <modifier_key>\\i2b2_DIAG\Secondary Diagnosis\</modifier_key>
                <applied_path>\i2b2\Diagnoses\Respiratory system (460-519)\%</applied_path>
            </constrain_by_modifier>
            <item_is_synonym>false</item_is_synonym>
        </item>
    </panel>
</ns3:query_definition>

```

I want to find all instances of chronic obstructive asthma diagnoses in the i2b2 system, including those classified as mild, moderate, moderate to severe, or severe, and those marked as primary or secondary diagnoses.