Following system configuration snippet extends "Applications" list, adding column for "Category" displaying classification of the application.

            <objectCollectionView id="77">
                <identifier>application</identifier>
                <display>
                    <label>Application.panel.applications</label>
                </display>
                <type>ServiceType</type>
                <collection>
                    <collectionRef oid="00000000-0000-0000-0000-000000000329" relation="org:default" type="c:ArchetypeType"/>
                </collection>
                <column>
                    <name>nameColumn</name>
                    <path>name</path>
                    <display>
                       <label>Name</label>
                    </display>
                 </column>
                <column>
                    <name>descriptionColumn</name>
                    <path>description</path>
                    <display>
                       <label>Description</label>
                    </display>
                    <previousColumn>nameColumn</previousColumn>
                 </column>
                <column>
                    <name>categoryColumn</name>
                    <path>extension/accessCategory</path>
                    <display>
                       <label>Category</label>
                    </display>
                    <previousColumn>descriptionColumn</previousColumn>
                 </column>
            </objectCollectionView>
