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A comment on Palantir's secret weapon isn't AI – it's Ontology. An open-source deep dive. Parent comment

Re:Palantir's secret weapon isn't AI – it's Ontology. An ope... by kumarvvr on Saturday February 21, 2026 @10:14PM (#47107759)
Do you have any resources or books to learn all the details of all these?

Also, what is UDF?

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Re:Palantir's secret weapon isn't AI – it's Ontology. An ope... by AxiomaticSpace on Saturday February 21, 2026 @10:22PM (#47107808)
Pretty much any SQL book will cover it those, and there's a bunch of online SQL tutorials. UDF means user defined function, so if there's some function you want to perform in SQL but that function doesn't come out of the box, you can just write your own. And those can be defined in non-SQL syntax, such as UDF's written in python or C++, which can be pretty handy.
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Re:Palantir's secret weapon isn't AI – it's Ontology. An ope... by dmoy on Saturday February 21, 2026 @10:30PM (#47107847)
> python or C++

Also sometimes Lua, which is kinda a nice middleground between c++ efficiency and python ease of writing

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Re:Palantir's secret weapon isn't AI – it's Ontology. An ope... by tfryman on Saturday February 21, 2026 @10:16PM (#47107770)
User defined functions
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Re:Palantir's secret weapon isn't AI – it's Ontology. An ope... by whattheheckheck on Saturday February 21, 2026 @11:06PM (#47108054)
Data warehouse toolkit for Kimball

Google will inmon for the info factory

Google data vault

Joe reis is the guy for tying it up with a modern bow recently.

Designing data intensive applications book

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