diff --git a/docs/Nonfunctional.md b/docs/Nonfunctional.md
index a14940f..a2d71dd 100644
--- a/docs/Nonfunctional.md
+++ b/docs/Nonfunctional.md
@@ -23,7 +23,7 @@ Platform portability
 
 Data portability 
  - the user should be able to move the data out of the application easy (soft requirement)
- - this means using an established, open-source data storage format
+ - this means using an established, open-source data storage format (such as SQLite format)
 
 Ergonomy
  - every main action in the program (calendar view, adding events, adding tasks) should be accessible from the main page
@@ -34,4 +34,4 @@ Volume
  - this means no errors handling at least 100 events for 1000 days
 
 Interoperability
- - the application should support interoperability with other calendar software (using open format iCal)
\ No newline at end of file
+ - the application should support interoperability with other calendar software (using open format iCal)