The amateurish experimental MRTE classification model is based on the concept "place",
    while the concept "place" is worked out into the concepts:
          -   inside and outside     (shortened as "in" and "out")
          - variable and invariable  (shortened as  "V" and   "I")


The 4 concept categories Matter, Space, Time, and Energy refer to 4 main attribute types.
                              Each attribute type is divided into 4 main quantity  types.


The configuration of 4 main attribute types x 4 main quantity types leads to 16 main concepts for
    a classification model of reality, which may be used as:
    - a model for a systematic dictionary
    - a model for a definition structure
    - a model of communication



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Schematic classification of the MRTE-model
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in/out-relation                    out-out     out-in       in-out     in-in                   in/out *1)

Variable/invariable-relation                                                               V/I
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-   Category  meaning
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K   Attribute quantity             unequal     great        small      equal                    
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M   Matter    a shape              untrue      info         real       true                I-I         in
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R   Space     place                route       reach        source     movable_particle    I-V        out
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T   Time      transformation       out         out->in      in->out    in                  V-I        out
              dis-place-ment
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E   Energy    metamorphosis        counter-act result       cause      co-operate          V-V         in
              to shape
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*1) The categories "Matter" and "Energy" refer to internal space.
    The categories "Space"  and "Time"   refer to external space.