Base type declarator
Keywords:  extensional feature
The base type declarator refers to base type property name and its extensional features, which are specific ODABA extensions.
Definition: 
base_declarator := syn_ident [ col_ext_rel (*)]
 
    
The base type declarator refers to base type property name and its extensional features, which are specific ODABA extensions.
base_declarator := syn_ident [ col_ext_rel (*)]