Customizing the metamodel : Using listof, oneof, and expressionof : ListOf : Creating grids for listof
  
Creating grids for listof
You may present the items in a ListOf property as a grid by adding the ASGRID keyword.
Example
Definition "Use Case"
{
CHAPTER "Steps"
PROPERTY "Use Case Steps" { EDIT COMPLETE LISTOF "Use Case Step" KEYED BY { "Package", "Use Case Name":Name, Name} ASGRID LENGTH 1200 }
}
Example of LISTOF ASGRID list