dde-application-manager/api/dbus/org.desktopspec.ApplicationManager1.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.ApplicationManager1">
        <property type="ao" access="read" name="List" />
        <method name="ReloadApplications">
            <annotation
                name="org.freedesktop.DBus.Description"
                value="This method is used to update the desktop file cache when needed.
                       You can pass a list of absolute paths to files or directories that you want to update.
                       Note: Application Manager only supports directory paths in $XDG_DATA_DIRS."
            />
        </method>

        <method name="Identify">
            <arg type="h" name="pidfd" direction="in" />

            <arg type="s" name="id" direction="out" />
            <arg type="o" name="application" direction="out" />
            <arg type="o" name="application_instance" direction="out" />

            <annotation
                name="org.freedesktop.DBus.Description"
                value="Given a pidfd,
                       this method return a destkop file id,
                       an application instance object path,
                       as well as an application object path.

                       NOTE:
                       1. You should use pidfd_open(2) to get a pidfd."
            />
        </method>
    </interface>
</node>