Record property-scoped contexts.

lib/json/ld/context.rb

@@ -248,6 +248,10 @@ def inspect
     # @return [Context]
     attr_accessor :previous_context
 
+    # Context is property-scoped
+    # @return [Boolean]
+    attr_accessor :property_scoped
+
     # Default language
     #
     #
@@ -426,6 +430,7 @@ def parse(local_context, remote_contexts: [], from_property: false, from_type: f
       result = self.dup
       result.provided_context = local_context if self.empty?
       result.previous_context ||= result.dup if from_type
+      result.property_scoped ||= from_property
 
       local_context = as_array(local_context)
 
@@ -435,6 +440,7 @@ def parse(local_context, remote_contexts: [], from_property: false, from_type: f
           # 3.1 If the `from_property` is  not null, and the active context contains protected terms, an error is raised.
           if from_property || result.term_definitions.values.none?(&:protected?)
             null_context = Context.new(options)
+            null_context.property_scoped = from_property
             null_context.previous_context = result if from_type
             result = null_context
           else