Meaning of the symbols attached to process flow icons

[ChrisNZ]

In this process flow, we have

A question mark on the top right corner of the icon image.
This indicates the presence of a prompt.

A brown triangle on the top left corner of the icon image.
This indicates a runtime warning.

A red circle and a cross on the top left corner of the icon image.
This indicates a runtime error.

A curved arrow pointing to 1 o'clock on the bottom left corner of the icon image.
This indicates an external link. A black triangle would indicate embedded code.

A red circle on the bottom right corner of the icon image.
This seems to be part of the icon itself, like the globe for HTML output icon? What a poor design choice!

A flag to the top right corner of the icon's text area.
This indicates a condition (yet untested as nothing has run). 

      
        The flag can change to a tick or a cross, which indicates a successful or a failed condition.

A number to the bottom right corner of the icon's text area.
What is this?

Is there a glossary of these symbols somewhere?

[ChrisNZ]

To note while we are looking for an icon glossary: Here are the ODS output icons for destinations

         CSV, HTML, PDF, RTF, Word, Powerpoint, Excel, XML, EPub.

ODS PCL does not update the process flow. 

[BillSawyer · Accepted solution]

When you right-click on a program object then choose Condition > Add.... then a number is assigned to that object which appears to represent the sequence in which the condition was added.

Regards,

Bill

[ChrisNZ]

Thanks Bill. Your replying is much appreciated.
Do you know if there is a use for these numbers?

I can;t imagine how surfacing the order when condions are added can be useful?