Index: openacs-4/packages/acs-tcl/tcl/application-data-link-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/application-data-link-procs.tcl,v
diff -u -r1.10 -r1.10.2.1
--- openacs-4/packages/acs-tcl/tcl/application-data-link-procs.tcl	4 Jan 2010 19:54:37 -0000	1.10
+++ openacs-4/packages/acs-tcl/tcl/application-data-link-procs.tcl	22 Mar 2011 16:13:47 -0000	1.10.2.1
@@ -254,6 +254,32 @@
     return [db_list links_from {}]
 }
 
+ad_proc -public application_data_link::get_links_to {
+    -object_id:required
+    {-from_type}
+    {-relation_tag ""}
+} {
+    Get a list of objects that are linked to an object,
+    possible using the relation_tag.
+    If from_type is a subtype of content_revision, we lookup 
+    content_items that have that content_type
+
+    @param object_id object_id two, get objects linked to this object
+    @param from_type object_type of the objects to get links from
+} {
+    set from_type_where_clause ""
+    set content_type_from_clause ""
+
+    if {[info exists from_type] && $from_type ne ""} {
+	set from_type_clause [db_map from_type_where_clause]
+        if {[content::type::is_content_type -content_type $from_type]} {
+	    set from_type_clause [db_map content_type_where_clause]
+	    set content_type_from_clause [db_map content_type_from_clause]
+	}
+    }
+    return [db_list links_to {}]
+}
+
 ad_proc -public application_data_link::scan_for_links {
     -text
 } {
Index: openacs-4/packages/acs-tcl/tcl/application-data-link-procs.xql
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/application-data-link-procs.xql,v
diff -u -r1.6 -r1.6.2.1
--- openacs-4/packages/acs-tcl/tcl/application-data-link-procs.xql	4 Jan 2010 19:54:37 -0000	1.6
+++ openacs-4/packages/acs-tcl/tcl/application-data-link-procs.xql	22 Mar 2011 16:13:47 -0000	1.6.2.1
@@ -99,6 +99,37 @@
     </querytext>
 </partialquery>
 
+<fullquery name="application_data_link::get_links_to.links_to">
+    <querytext>
+        select object_id_one
+        from acs_data_links,
+        acs_objects
+	$content_type_from_clause
+        where object_id_two = :object_id
+	and object_id = object_id_one
+    [application_data_link::relation_tag_where_clause -relation_tag $relation_tag]
+	$from_type_where_clause
+    </querytext>
+</fullquery>
+
+<partialquery name="application_data_link::get_links_to.from_type_clause">
+    <querytext>
+	and object_type = :from_type
+    </querytext>
+</partialquery>
+
+<partialquery name="application_data_link::get_links_to.content_type_from_clause">
+    <querytext>
+	, cr_items
+    </querytext>
+</partialquery>
+
+<partialquery name="application_data_link::get_links_to.content_type_where_clause">
+    <querytext>
+	and content_type = :object_type
+    </querytext>
+</partialquery>
+
 <fullquery name="application_data_link::delete_from_list.delete_links">
     <querytext>
   	delete from acs_data_links where object_id_one=:object_id