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  • From: "Marco Stahl" <marco.stahl AT gmx.net>
  • To: piw AT lists.ibiblio.org
  • Subject: PIW Relationships Modelling
  • Date: Fri, 15 Jul 2005 03:05:56 +0200 (MEST)

Hi all!

Maybe its possible to express Relationships as INPUTS/OUTPUTS of an entity
(plant, animal, human, machine,...).

An Entity could also be a category.

Example:

entity | parent
---------------
creature NULL
animal creature
plant creature
bean plant
hemp plant


entity | OUTPUT
---------------
bean nitrogen
hemp climb help
hemp seed
hemp fibre


entity | INPUTS
---------------
bean climb help
hemp nitrogen


We could also include the amount of the produced or needed product and
reduce OUTPUT and INPUT to INPUT/OUTPUT.

entity | (INPUT)/OUTPUT | amount
-------------------------------------
bean nitrogen 100
bean climbhelp -100
hemp nitrogen -100
hemp climb help 50
hemp seed 50
hemp fibre 50


If Hemp is normaly a average "climb help" but a good one for beans, we could
express that in this way:

entity | (INPUT)/OUTPUT | amount
-------------------------------------
bean nitrogen 100
bean climbhelp -100
hemp nitrogen -100
hemp climb help 50
hemp climb help bean 100
hemp seed 50
hemp fibre 50

or alternativ:

entity | (INPUT)/OUTPUT | amount | targetentity
--------------------------------------------------
bean nitrogen 100
bean climbhelp -100
hemp nitrogen -100
hemp climb help 50
hemp climb help 100 bean
hemp seed 50
hemp fibre 50


Advantage of this approach:
---------------------------

* No need for writing 10000000 relationshipentries just for
the fact, that 100 plants produce something that all other
plants need (can even reduced/automated more with help
of categories)
* you can easely integrate other entities than plants
* you can easely express uses as products (and inputs of the entity human)
* you could even express stuff like "a plant needs wet soil, high
temperature"

* maybe: (semi)automatic guild/permaculture-design-generation


I hope you like my ideas,

Saludos, Marco

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