#half-hour__30_minutes  a half of an hour
  part of:  #hour
  supertype:  #time_unit__unit_of_time  a unit for measuring time periods
     supertype:  pm#unit_of_time_duration  the class of all unit of measures used to measure time, e.g., minute, second, hour, etc.
        supertype:  dl#time_interval__T
           supertype:  dl#temporal_region__TR  a value for a temporal quality, e.g., 24/5/2002, 2 seconds
              supertype:  sumo#time_measure
                 supertype:  pm#time_measure__temporal_attribute_or_quality_or_measure  temporal duration or positions of time_points and time_intervals along the universal timeline
                    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:  sumo#constant_quantity  physical_quantity with a constant value, e.g., 3 meters and 5 hours; the magnitude (see magnitude_fn) of every constant_quantity is a real_number; constant_quantities are expressed with measure_fn, e.g., 3 meters can be expressed as (sumo#measure_fn 3 meter); they form a partial order with the less_than relation, since less_than is a relation_extended_to_quantities and less_than is defined over the real_numbers; the less_than relation is not a total order over the class constant_quantity since elements of some subclasses of constant_quantity (such as length quantities) are incomparable to elements of other subclasses of constant_quantity (such as mass quantities)
                    supertype:  sumo#physical_quantity  a measure of some quantifiable aspect of the modeled world, such as 'the earth's diameter' (a constant length) and 'the stress in a loaded deformable solid' (a measure of stress, which is a function of three spatial coordinates); physical_quantities need not be material, e.g., amounts of money (in specified currencies) would be instances of sumo#physical_quantity
                       supertype:  sumo#quantity  any specification of how many or how much of something there is
                          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:  sumo#abstract__entity_without_spatial_feature  e.g., knowledge, motivation, measure; properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium; instances of sumo#abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place or time without some physical encoding or embodiment
                             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:  dl#region__R  the measure of an attribute/dimension
                 supertype:  sumo#physical_quantity  a measure of some quantifiable aspect of the modeled world, such as 'the earth's diameter' (a constant length) and 'the stress in a loaded deformable solid' (a measure of stress, which is a function of three spatial coordinates); physical_quantities need not be material, e.g., amounts of money (in specified currencies) would be instances of sumo#physical_quantity
                 supertype:  dl#abstract__abstraction__ab
                    supertype:  sumo#abstract__entity_without_spatial_feature  e.g., knowledge, motivation, measure; properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium; instances of sumo#abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place or time without some physical encoding or embodiment
                    supertype:  dl#abstract_or_perdurant__AB_or_PD
                       supertype:  dl#entity  a category from DOLCE or generalized by a category from DOLCE
                          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#unit_of_measure   Any kind of unit of measure, metre, dollar, kilogram, etc. 
           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:  #unit_of_measurement__unit  any division of quantity accepted as a standard of measurement or exchange; "the dollar is the United States unit of currency"; "a unit of wheat is a bushel"; "change per unit volume"
        supertype:  pm#unit_of_measure   Any kind of unit of measure, metre, dollar, kilogram, etc. 
        supertype:  #definite_quantity  a specific measure of amount
           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:  #size  the physical magnitude of something (how big it is); "a wolf is about the size of a large dog"
           supertype:  #magnitude  the property of relative size or extent; "they tried to predict the magnitude of the explosion"
              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

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