Pragmas ?

Voici un bout d'une doc ORACLE :

Code:

1
2
3
4
5
6
7
8
9
10
11
NEXT_ITEM_TYPE Function
This function determines the datatype of the next item in the local message buffer.
 
After you have called RECEIVE_MESSAGE to place pipe information in a local buffer, call NEXT_ITEM_TYPE.
 
Syntax
DBMS_PIPE.NEXT_ITEM_TYPE 
  RETURN INTEGER; 
 
Pragmas
pragma restrict_references(next_item_type,WNDS,RNDS);

C'est quoi Pragmas ?

Merci d'avance pour vos réponses