[HN Gopher] Protege: A free, open-source ontology editor for bui...
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       Protege: A free, open-source ontology editor for building
       intelligent systems
        
       Author : stefankuehnel
       Score  : 40 points
       Date   : 2023-11-10 17:29 UTC (5 hours ago)
        
 (HTM) web link (protege.stanford.edu)
 (TXT) w3m dump (protege.stanford.edu)
        
       | joshuanapoli wrote:
       | What would one use an ontology editor for?
        
         | riku_iki wrote:
         | for editing ontology..
        
         | wbazant wrote:
         | Improving an ontology over time! A use case I've seen is to
         | maintain a consistent tree-like display across different pages
         | of a science website, microbiomedb.org.
         | 
         | You'd load up an ontology as an .xml, use the UI to browse the
         | nodes and a hierarchy you already have, decide how to handle
         | the new thing you want to achive and add a new leaf somewhere
         | or rejiggle the tree somehow, and at the end you save the
         | changed .xml.
        
         | the-alchemist wrote:
         | There's a lot of Protege tutorials out there, but here's what
         | an ontology (in the OWL sense of the word, let's you do). The
         | "pizza ontology" is the Hello World of the ontology world.
         | 
         | * imagine a graph of things you wanna organize ("model"), say
         | world religions, or the plant and animal kingdom * you can tell
         | the system that anything that's a plant can never be an animal.
         | or viruses can't be bacteria * or lions and zebras are both
         | mammals * you can define what mammals are, vertebra, heart,
         | brain, etc.
         | 
         | The interesting part is ontology _validation_ or querying.
         | 
         | Is it internally consistent? Maybe you specified viruses and
         | bacteria and said they are never the same thing, but the way
         | you modeled it, they are identical! Hmm, you'll have to update
         | your definition of bacteria, or viruses, or both.
         | 
         | Next, you try to put fungi in the system, but there's an error
         | because fungi do not belong to the plant or animal kingdom:
         | they are their own thing.
         | 
         | So this is a fairly simplistic use case, but scale this up to
         | hundreds if not thousands of entities and you can start to see
         | the value.
         | 
         | Imagine sticking the human genome in there, and which drugs act
         | on which chromosomes, etc.
         | 
         | It's a niche, for sure, if you need something like reasoning
         | it's the way to go.
        
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       (page generated 2023-11-10 23:00 UTC)