Analysis :: Getting Available Cell Properties Via XML/A

In the relevant documentation on Cell Properties I read:

" Only the CELL_ORDINAL, FORMATTED_VALUE, and VALUE cell properties are required. All cell properties, intrinsic or provider-specific, are defined in the PROPERTIES schema rowset, including their data types and provider support. For more information about the PROPERTIES schema rowset, see MDSCHEMA_PROPERTIES Rowset."

So it seems that for each cube, the MDSCHEMA_PROPERTIES rowset would at least need to return CELL_ORDINAL, FORMATTED_VALUE and VALUE would need to be in the MDSCHEMA_PROPERTIES rowset.

However, when I retrieve the MDSCHEMA_PROPERTIES Rowset via XML/A, with a request like this:

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="...I can't post links yet..." SOAP-ENV:encodingStyle="...I can't post links yet...">
 <SOAP-ENV:Body>
  <Discover xmlns="urn:schemas-microsoft-com:xml-analysis" SOAP-ENV:encodingStyle="...I can't post links yet...">
   <RequestType>MDSCHEMA_PROPERTIES</RequestType>

[Code] ...

I only get a list of properties that apply to the levels. CELL_ORDINAL, FORMATTED_VALUE and VALUE are not there.

The rowset columns for PROPERTY_TYPE is always either 1 or 5 (which according to MDSCHEMA_PROPERTIES documentation indicates these are all member properties, not cell properties)

DIMENSION_UNIQUE_NAME, HIERARCHY_UNIQUE_NAME, LEVEL_UNIQUE_NAME are always filled, also indicating that these are member properties, not cell properties.

So the question is: Why don't I see any cell properties in the rowset?Is the documentation on Cell properties I cited wrong? Is there another way to retrieve a list or rowset of available cell properties via XML/A?