dde-application-manager/api/dbus/org.desktopspec.MimeManager1.xml

<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "https://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node>
    <interface name="org.desktopspec.MimeManager1">

        <method name="queryFileTypeAndDefaultApplication">
            <arg type="s" name="filePath" direction="in"/>
            <arg type="s" name="mimeType" direction="out"/>
            <arg type="o" name="application" direction="out"/>
        </method>

        <method name="setDefaultApplication">
            <arg type="a{ss}" name="defaultApps" direction="in"/>
            <annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="QStringMap"/>
        </method>

        <method name="unsetDefaultApplication">
            <arg type="as" name="mimeTypes" direction="in"/>
        </method>

        <method name="listApplications">
            <arg type="s" name="mimeType" direction="in"/>
            <arg name="applications_and_properties" type="a{oa{sa{sv}}}" direction="out"/>
            <annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="ObjectMap"/>
        </method>
    </interface>
</node>