The core relation composition operator reminds me of Alloy's dot-join operator [1]. Wondering if anyone can comment on the differences, theoretical or practical?

[1]: https://practicalalloy.github.io/chapters/structural-topics/...

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remywang a day ago | parent [-]

They are exactly the same!

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wbadart a day ago | parent [-]

Cool! That's both unsurprising, given the apparent similarities, but also a little surprising, since Alloy is built on relational algebra, which you're very careful to distinguish from TAR in your paper. (Great read, btw!)

	▲	remywang a day ago \| parent [-]
		Thanks! Alloy is also based on TAR, they just call it the more common name of relation algebra (not relational).