I can't speak for all graph stores, but in addition to ADB being json-native as described below, many graph users describe the types of any value, not just floats or ints, as a relation or property to the value itself.
So you'd never have any value; object, key, value of a string, int, float, or reference, without associated meta-data typing it elsewhere in the graph, and would be unlikely to operate on that data without making reference to those properties.
So you'd never have any value; object, key, value of a string, int, float, or reference, without associated meta-data typing it elsewhere in the graph, and would be unlikely to operate on that data without making reference to those properties.