dialog_schema.xml

<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

<xs:element name="nodes" type="nodesSchema"/>

<xs:complexType name="nodesSchema">
    <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="import" type="importSchema"/>
        <xs:element name="autogenerate" type="autogenerateSchema"/>
        <xs:element name="node" type="nodeSchema"/>
    </xs:choice>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="importSchema">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="scope" type="xs:string"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>

<xs:complexType name="autogenerateSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="output" type="outputSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="outputs" type="outputsSchema" minOccurs="0" maxOccurs="1"/>
        <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="type" use="required" type="autogenerateTypeSchema"/>
    <xs:attribute name="propagate" type="trueFalseSchema"/>
    <xs:attribute name="on" type="trueFalseSchema"/>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="nodeSchema">
    <xs:all>
        <xs:element name="condition" type="conditionSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="type" type="nodeTypeSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="context" type="contextSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="output" type="outputSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="goto" type="gotoSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="nodes" type="nodesSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="handlers" type="handlersSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="slots" type="slotsSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="actions" type="actionsSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="digress_in" type="digressInSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="digress_out" type="digressOutSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="digress_out_slots" type="digressOutSlotsSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="event_name" type="eventNameSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="metadata" type="metadataSchema" minOccurs="0" maxOccurs="1" nillable="true"/>
        <xs:element name="disabled" type="trueFalseSchema" minOccurs="0" maxOccurs="1"/>
    </xs:all>
    <xs:attribute name="name" type="xs:string"/>
    <xs:attribute name="title" type="xs:string"/>
    <xs:attribute name="scope" type="xs:string"/>

</xs:complexType>

<xs:complexType name="conditionSchema">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="confidenceThreshold" type="xs:string"/>
            <xs:attribute name="scope" type="xs:string"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>

<xs:simpleType name="nodeTypeSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="standard"/>
        <xs:enumeration value="event_handler"/>
        <xs:enumeration value="frame"/>
        <xs:enumeration value="slot"/>
        <xs:enumeration value="response_condition"/>
        <xs:enumeration value="folder"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="outputsSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="output" type="outputSchema" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:simpleType name="autogenerateTypeSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="abort"/>
        <xs:enumeration value="again"/>
        <xs:enumeration value="back"/>
        <xs:enumeration value="repeat"/>
        <xs:enumeration value="generic"/>
    </xs:restriction>
</xs:simpleType>

<xs:simpleType name="trueFalseSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="true"/>
        <xs:enumeration value="True"/>
        <xs:enumeration value="false"/>
        <xs:enumeration value="False"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="contextSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
    <xs:attribute name="structure">
        <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="listItem"/>
              <xs:enumeration value="emptyList"/>
              <xs:enumeration value="emptyDict"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
</xs:complexType>

<xs:complexType name="outputSchema">
    <xs:choice minOccurs="1" maxOccurs="1">
        <xs:sequence minOccurs="1" maxOccurs="1">
            <xs:element name="text" type="textSchema" minOccurs="0" maxOccurs="1"/>
            <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:sequence minOccurs="1" maxOccurs="1">
            <xs:element name="textValues" type="textValuesSchema" minOccurs="0" maxOccurs="1"/>
            <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:sequence minOccurs="1" maxOccurs="1">
            <xs:element name="response" type="responseSchema" minOccurs="0" maxOccurs="1"/>
            <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:choice>
    <xs:attribute name="scope" type="xs:string"/>
    <xs:attribute name="structure">
        <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="listItem"/>
              <xs:enumeration value="emptyList"/>
              <xs:enumeration value="emptyDict"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
</xs:complexType>

<xs:complexType name="textSchema">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="scope" type="xs:string"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>

<xs:complexType name="textValuesSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="values" type="valuesSchema" minOccurs="0" maxOccurs="unbounded" nillable="true"/>
        <xs:element name="append" type="trueFalseSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="selection_policy" type="selectionPolicySchema" minOccurs="0" maxOccurs="1"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
    <xs:attribute name="structure">
        <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="listItem"/>
              <xs:enumeration value="emptyList"/>
              <xs:enumeration value="emptyDict"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
</xs:complexType>

<xs:complexType name="valuesSchema">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="structure">
                <xs:simpleType>
                    <xs:restriction base="xs:string">
                      <xs:enumeration value="listItem"/>
                      <xs:enumeration value="emptyList"/>
                      <xs:enumeration value="emptyDict"/>
                    </xs:restriction>
                </xs:simpleType>
            </xs:attribute>
            <xs:attribute name="scope" type="xs:string"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>

<xs:simpleType name="selectionPolicySchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="random"/>
        <xs:enumeration value="sequential"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="gotoSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="behavior" type="behaviorSchema" minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="target" type="xs:string" minOccurs="1" maxOccurs="1"/>
        <xs:element name="selector" type="selectorSchema" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="handlersSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="handler" type="handlerSchema" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="slotsSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="slot" type="slotSchema" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="metadataSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
    <xs:attribute name="structure">
        <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="listItem"/>
              <xs:enumeration value="emptyList"/>
              <xs:enumeration value="emptyDict"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
</xs:complexType>

<xs:simpleType name="behaviorSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="skip_user_input"/>
        <xs:enumeration value="get_user_input"/>
        <xs:enumeration value="jump_to"/>
        <xs:enumeration value="reprompt"/>
        <xs:enumeration value="skip_slot"/>
        <xs:enumeration value="skip_all_slots"/>
    </xs:restriction>
</xs:simpleType>

<xs:simpleType name="selectorSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="user_input"/>
        <xs:enumeration value="condition"/>
        <xs:enumeration value="body"/>
        <xs:enumeration value="client"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="handlerSchema">
    <xs:all>
        <xs:element name="condition" type="conditionSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="context" type="contextSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="output" type="outputSchema" minOccurs="0" maxOccurs="1"/>
    </xs:all>
    <xs:attribute name="eventName" use="required" type="eventNameSchema"/>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:simpleType name="eventNameSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="focus"/>
        <xs:enumeration value="input"/>
        <xs:enumeration value="filled"/>
        <xs:enumeration value="validate"/>
        <xs:enumeration value="filled_multiple"/>
        <xs:enumeration value="generic"/>
        <xs:enumeration value="nomatch"/>
        <xs:enumeration value="nomatch_responses_depleted"/>
        <xs:enumeration value="digression_return_prompt"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="slotSchema">
    <xs:all>
        <xs:element name="handlers" type="handlersSchema" minOccurs="0" maxOccurs="1"/>
    </xs:all>
    <xs:attribute name="variable" use="required" type="xs:string"/>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="responseSchema">
    <xs:all>
        <xs:element name="condition" type="conditionSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="context" type="contextSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="output" type="outputSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="goto" type="gotoSchema" minOccurs="0" maxOccurs="1"/>
    </xs:all>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="actionsSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:element name="action" type="actionSchema" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="actionSchema">
    <xs:all>
        <xs:element name="name" type="actionNameSchema" minOccurs="1" maxOccurs="1"/>
        <xs:element name="type" type="actionTypeSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="parameters" type="parametersSchema" minOccurs="0" maxOccurs="1"/>
        <xs:element name="result_variable" type="resultVariableSchema" minOccurs="1" maxOccurs="1"/>
        <xs:element name="credentials" type="credentialsSchema" minOccurs="0" maxOccurs="1"/>
    </xs:all>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:complexType name="actionNameSchema" mixed="true">
    <xs:all>
        <xs:element name="replace" type="xs:string" minOccurs="0" />
        <xs:element name="importText" type="xs:string" minOccurs="0" />
    </xs:all>
    <xs:attribute name="scope" type="xs:string"/>
</xs:complexType>

<xs:simpleType name="actionTypeSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="client"/>
        <xs:enumeration value="server"/>
        <xs:enumeration value="cloud_function"/>
        <xs:enumeration value="web_action"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="parametersSchema">
    <xs:sequence minOccurs="1" maxOccurs="1">
        <xs:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
    </xs:sequence>
    <xs:attribute name="scope" type="xs:string"/>
    <xs:attribute name="structure">
        <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:enumeration value="listItem"/>
              <xs:enumeration value="emptyList"/>
              <xs:enumeration value="emptyDict"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:attribute>
</xs:complexType>

<xs:simpleType name="digressInSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="not_available"/>
        <xs:enumeration value="returns"/>
        <xs:enumeration value="does_not_return"/>
    </xs:restriction>
</xs:simpleType>

<xs:simpleType name="digressOutSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="allow_returning"/>
        <xs:enumeration value="allow_all"/>
        <xs:enumeration value="allow_all_never_return"/>
    </xs:restriction>
</xs:simpleType>

<xs:simpleType name="digressOutSlotsSchema">
    <xs:restriction base="xs:string">
        <xs:enumeration value="not_allowed"/>
        <xs:enumeration value="allow_returning"/>
        <xs:enumeration value="allow_all"/>
    </xs:restriction>
</xs:simpleType>

<xs:complexType name="resultVariableSchema">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="scope" type="xs:string"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>

<xs:complexType name="credentialsSchema">
    <xs:simpleContent>
        <xs:extension base="xs:string">
            <xs:attribute name="scope" type="xs:string"/>
        </xs:extension>
    </xs:simpleContent>
</xs:complexType>

</xs:schema>