▼ Custom Property: null vs blank

To determine if a custom property is null (ie. does not exist) vs. blank, use the following code snippet:

---

<!--$executeService("SS_GET_ALL_CUSTOM_NODE_PROP_DEFS")-->
<!--$if rsExists("CustomNodePropDefs")-->
<!--$if isTrue(rsFindRowPrimary("CustomNodePropDefs", "[customPropName]"))-->
     [custom property exists]
<!--$else-->
     [custom property doesn't exist]
<!--$endif-->
<!--$endif-->

---

Note:  It is a misprint in both the 10gR3 and 11g Site Studio Technical Reference Guides when it says the SS_GET_ALL_CUSTOM_NODE_PROP_DEFS service returns a ResultSet named "CustomNodePropertyDefs"; it is actually "CustomNodePropDefs".  In fact, my blog has the only reference to "CustomNodePropDefs" on the internet...seriously. Also, SS_GET_ALL_CUSTOM_NODE_PROP_DEFS requires write access to call it so make sure to handle that accordingly.

Good luck.