Are there other options for Placeholders?

Good morning everyone,

We are starting to publish Webi Documents to Sharepoint via Dynamic Recipients in Publications.

I can see from the drop down list of placeholders what is available such as:

%SI_EMAIL_ADDRESS%

%SI_NAME%

.%EXT%

etc. etc. etc.

Any ideas of what other options are available or where I could go to find such a list?

With thanks

Gill