#mass  the property of a body that causes it to have weight in a gravitational field
  subtype:  #biomass  #rest_mass  #relativistic_mass  #bulk  #gravitational_mass  #inertial_mass  #atomic_mass  #atomic_weight  #molecular_weight  #mass_defect  #mass_unit (pm)
  supertype:  #fundamental_quantity__fundamentalquantity__fundamental_measure__fundamentalmeasure  one of the four quantities that are the basis of systems of measurement
     supertype:  #measure__quantity__amount__quantum  how much there is of something that you can measure
        supertype:  pm#attribute_or_quality_or_measure  e.g., mass, mass unit, 1 kg, frequency, [2-3] hz, color, blue, speed, 1 m/s
           supertype:  pm#non_spatial_object__nonspatialobject  abstraction or description content/medium/container (a description medium that has some spatial feature is both instance of sumo#object and pm#non_spatial_object
              supertype:  pm#entity  something that can be "involved" in a situation
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
              supertype:  cyc#intangible  The collection of things that are not physical -- are not made of, or encoded in, matter. Every cyc#Collection is a cyc#intangible (even if its instances are tangible), and so are some cyc#individuals.  Caution: do not confuse `tangibility' with `perceivability' -- humans can perceive light even though it's intangible--at least in a sense.
                 supertype:  cyc#partially_intangible__partiallyintangible  The collection of things that either are wholly intangible (see cyc#Intangible) or have at least one intangible (i.e. immaterial) part (see cyc#intangibleParts). This includes intangible individuals, such as instances of cyc#Number-General  or cyc#Agreement, as well as non-individuals (all of which are intangible), i.e. instances of cyc#SetOrCollection.  It also includes things that have both tangible and intangible components (see cyc#CompositeTangibleAndIntangibleObject),  such as a printed copy of a newspaper (as its information content is intangible) or a person (as her mental states are intangible).
                    supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
           supertype:  pm#thing_that_can_be_seen_as_a_relation  usable as relation type
              supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                 supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
           supertype:  pm#individual__particular___supertype_of_1st_order_types  all individuals (for concepts or relations) are implicitely or explicitely instance of that type
              supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
  supertype:  #physical_property  a property used to characterize physical objects
     supertype:  menu#physical_characteristic  this category is for menu-generation purposes
        supertype:  pm#physical/spatial_attribute_or_quality_or_measure  e.g., mass/length/color measure; here are most of the subtypes of #property.attribute, e.g., #visual_property
           supertype:  pm#attribute_or_quality_or_measure  e.g., mass, mass unit, 1 kg, frequency, [2-3] hz, color, blue, speed, 1 m/s
     supertype:  #property.attribute  a basic or essential attribute shared by all members of a class; "a study of the physical properties of atomic particles"
        supertype:  #attribute  an abstraction belonging to or characteristic of an entity
           supertype:  pm#attribute_or_quality_or_measure  e.g., mass, mass unit, 1 kg, frequency, [2-3] hz, color, blue, speed, 1 m/s

3 statements are about indirect instances of #mass: pm#graph1_on_animal, pm#graph1_on_spamOnly@phmartin.info, dg#graph1_on_daniel.goodburn@dsto.defence.gov.au
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