Chunks syntax: equivalence of links definitions

[tidoust]

There are three main ways to describe a link between chunks:

1. A chunk property references another chunk identifier as in:

   person John { likes Mary }
   person Mary {}

2. The compact form is used:

   person John {}
   person Mary {}
   John likes Mary

3. An explicit link gets created:

   person John {}
   person Mary {}
   likes {
   @subject John
   @object Mary
   }

The intro to chunks suggests that these syntaxes are equivalent, but I'm not sure what that means in practice:

• If 1. is used, would a chunks parser automatically create the chunk in 3 (unless it already exists)? Or does that only happen when 2. is used?
• If 2. or 3. is used, would a chunks parser automatically add a likes property to the chunk whose identifier is John (unless it already exists)?

If not, what does "equivalent" mean?