Trying to understand a Pilot Script assignment of the word TEXT to a global variable @Config:=Text;

In trying to understand a Protocol that was developed for one of  our Scientific Groups  by Biovia,  I came across a Pilot Script global variable assignment @Config:=Text;  in a sub protocol.

The sub protocol  only has   Delimited Text Reader component connected to a Custom Manipulator component via the Pass Port  - there's nothing else in the sub protocol. 

When   @Config:=Text;    is used as the only Pilot Script assignment in the Custom Manipulator    that the  "Entire Content of a File"  is assigned to   @Config    variable. 

  I tried to find out if   Text    is a special reserved word, keyword,  just about anything else I could think of looking up in PLP help References,  but could not find a single clue.

Thanks

Don