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Alexandre Bertails

@alex.bertails.org
168 followers 157 following 35 posts

UDA (Unified Data Architecture) and Upper domain modeling language at Netflix. Former , W3C/MIT. RDF expert who prefers Scala over Java. One Piece nerd.

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Reposted by Alexandre Bertails
Arman Bilge @armanbil.ge · 14/09/2026
I created Calico to scratch an itch: what if I could use Cats Effect and FS2 to build delightful, reactive webapps? Join my interactive lab and let's find out together! I am excited to teach you about fibers and monads and we will watch them come to life in our browsers. www.armanbilge.com/calico/
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The One Piece Podcast @onepiecepodcast.com · 23/08/2026
Top 30 in the One Piece Popularity Poll
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Alexandre Bertails @alex.bertails.org · 03/07/2026
Was it recorded?
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Kris Jenkins @krisajenkins.bsky.social · 22/06/2026
I am worried about Vibe Coding, but there's something that worries me far more: Vibe Management. blog.jenkster.com/2026/06/vibe...
blog.jenkster.com
Vibe Management
Lots of people are worried about Vibe Coding, and rightly so, but the thing that worries me far more is Vibe Management.Vibe Management goes like this: Someone in middle management is told to come up....
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∃ugene -Yokota 🥙 @eed3si9n.com · 15/06/2026
🛠️ sbt 2.0.0 is released! sbt 2.0 is a new major series of sbt, based on Scala 3 constructs and Bazel-compatible cache system. many thanks to Scala Center, Anatolii Kmetiuk (new maintainer), Adrien Piquerez (alumni), and other volunteers like Kenji Yoshida eed3si9n.com/sbt-2.0.0 #Scala
a screenshot of sbt session demonstrating sbt run called twice. the first run shows the startup sequence of the sbt server and shows "hello" on screen.

the second run, invoked via "sbt run" shows "hello" again, but in 0s.
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Camille Fournier @skamille.themanagerswrath.com · 31/05/2026
Boring but functional post on something I think more leaders need to address: guidelines for respectful use of AI medium.com/@skamille/gu...
medium.com
Guidelines for Respectful Use of AI
As companies adopt AI tools, a lot of time is spent on thinking about AI policies from a security, compliance, or even cost-focused angle…
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Alexandre Bertails @alex.bertails.org · 31/05/2026
Also got it a few times, both desktop and phone. Also on Safari.
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Larry Swanson @larry.bsky.social · 26/05/2026
Giancarlo Guizzardi advances the fields of #semantics, #ontology, and #conceptualModeling with his work on the Unified Foundational Ontology (UFO), the OntoUML pattern language, and #explainableAI. Fun conversation. Hope you enjoy it, too. knowledgegraphinsights.com/giancarlo-gu...
knowledgegraphinsights.com
Giancarlo Guizzardi: ontology, semantics, and explainable AI
Giancarlo Guizzardi is an expert on ontology engineering, conceptual modeling, semantics, and explainable AI at the University of Twente.
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Larry Swanson @larry.bsky.social · 12/05/2026
Ora Lassila and @ktk.netlabs.org lead the W3C working group that is tackling the #RDF reification problem. RDF 1.2 introduces the reifier, which lets you annotate individual graph relationships with provenance, confidence, and source. knowledgegraphinsights.com/rdf12/
knowledgegraphinsights.com
Ora Lassila and Adrian Gschwend: RDF 1.2 working group update
Ora Lassila and Adrian Gschwend lead the W3C RDF 1.2 working group, which is focusing on improvements to how RDF handles reification.
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Alexandre Bertails @alex.bertails.org · 12/05/2026
The stream/table duality also applies to RDF Datasets. Each named graph can be seen as a keyed message on a log-compacted topic, with the graph name as the key. bertails.org/2026/05/11-r...
bertails.org
RDF Dataset as a Log-Compacted Topic
bertails.org blog linked data rdf scala
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Alexandre Bertails @alex.bertails.org · 24/04/2026
@spahn711.bsky.social même si c'est plus américain, mais clairement super chouette 😁
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Rep. Alexandria Ocasio-Cortez @ocasio-cortez.house.gov · 05/03/2026
Republicans are using kids as a smokescreen for what Big Tech lobbyists want: a national surveillance program to harvest our data with zero protections for people and their privacy. We must fight this dangerous expansion of surveillance technology.
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Typelevel @typelevel.org · 05/03/2026
The Typelevel Foundation was determined to be a 501(c)(3) public charity! This is a testament to the intellectual merit and educational value of our community's contributions to functional programming. Congratulations! typelevel.org/blog/charity...
typelevel.org
Typelevel Foundation is a 501(c)(3) public charity
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Alexandre Bertails @alex.bertails.org · 20/02/2026
Hrmmm, I will talking about UDA (Unified Data Architecture) at @devoxx.fr ... en français ? 😱
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The One Piece Podcast @onepiecepodcast.com · 10/02/2026
One Piece Season 2 trailer youtu.be/S-XxKVxZ2fU
youtu.be
ONE PIECE: Season 2 | Official Trailer | Netflix
YouTube video by Netflix
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The One Piece Podcast @onepiecepodcast.com · 08/02/2026
We're proud to announce that @katmabu.bsky.social will be on our podcast to talk about One Piece, her campaign, and the importance of fiction during these trying times. The episode will be available on Thursday 2/12! More info: www.patreon.com/posts/150252... Kat's campaign: www.katforillinois.com
U.S. Congressional Candidate Kat Abughazaleh at a podium after her federal indictment, speaking out against federal fascism and authoritarianism.
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Alexandre Bertails @alex.bertails.org · 01/02/2026
@jennajordan.me @juansequeda.bsky.social Can't wait for that one 😁
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Alexandre Bertails @alex.bertails.org · 20/01/2026
Looks like reading the entire post requires a Substack account? Maybe even a subscription?
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Alexandre Bertails @alex.bertails.org · 09/01/2026
What is the best place to follow your academic work related to One Piece?
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Aaron Rupar @atrupar.com · 07/01/2026
Mayor Jacob Frey: "They are already trying to spin this as an action of self defense. Having seen the video myself, I want to tell everybody directly that is bullshit."
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Captain Mark Kelly @captmarkkelly.bsky.social · 05/01/2026
Four generations of my family have served our country. Service is in my blood. The President wouldn’t know anything about that.
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Alexandre Bertails @alex.bertails.org · 02/01/2026
I was recently interviewed by Ashleigh Faith on her IsA DataThing PODCASTs. We somehow went deep into domain modeling and the constraints that shaped Upper, Netflix UDA's conceptual framework. www.youtube.com/watch?v=K-Av...
youtube.com
Model Once, & Represent Everywhere? Behind the Scenes of the Netflix Unified Data Architecture
YouTube video by Ashleigh Faith
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The One Piece Podcast @onepiecepodcast.com · 21/12/2025
One Piece Season 2 - Recording Chopper
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Eurosky Sebastian @sebastian.eurosky.social · 10/12/2025
Brilliant analysis of how the far right acts as one international party and that it's dangerous to respond to them only nationally while they already think and act transnationally.
euractiv.com
The far right is acting as one party. When will we? | Euractiv
Liberal institutions treat each surge of populism as a domestic challenge to be managed within national elections or courts. Meanwhile the far right amplifies each other’s victories, recycles each oth...
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Marc Hedlund @marcprecipice.bsky.social · 08/11/2025
From my friend Kyle. This is essential reading for all Americans. aphyr.com/posts/397-i-...
aphyr.com
I Want You to Understand Chicago
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Salar Rahmanian @salarrahmanian.bsky.social · 08/11/2025
📣 It gives me great pleasure in welcoming @armanbil.ge of #typelevel to #BayAreaScala #meetup with a highly anticipated talk 👉 Calico: my love letter to the Resource monad For full details of his talk and other speakers can be found here: luma.com/9ww60v3l #scala #fp #SanFrancisco @scala-lang.org
luma.com
Calico & the Resource monad, Scripting on the JVM, and Nix Hashbangs · Luma
We have three great talks for this in person event by three great speakers! Calico: my love letter to the Resource monad I will share the story of my…
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Larry Swanson @larry.bsky.social · 04/11/2025
At Netflix, @alex.bertails.org and his team have adopted #RDF to build a Unified Data Architecture (UDA) and a #domainModeling language, Upper, that let them quickly and efficiently share complex #data with their internal engineering customers. knowledgegraphinsights.com/alex-bertails/
knowledgegraphinsights.com
Alexandre Bertails: the Netflix Unified Data Architecture
Alexandre Bertails has built at Netflix a Unified Data Architecture and Upper domain modeling language to "Model Once, Represent Everywhere."
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Don Moynihan @donmoyn.bsky.social · 03/11/2025
Bari Weiss gets the Trump endorsement, the logical endpoint of her fearless independent journalism at the Free Press
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Alexandre Bertails @alex.bertails.org · 15/10/2025
Not sure for “best” but been using the one from fs2 for a while now and it just works.
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Robin Berjon @robin.berjon.com · 11/10/2025
If you're looking for some rock solid techno-geopolitical analysis, get the good stuff from @leevisaari.bsky.social.
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Sylvain GRANDSERRE @sylvaingrandserre.bsky.social · 03/10/2025
Proche de Pasqua ⚖️, ministre de Chirac ⚖️, Sarkozy ⚖️ a eu comme premier ministre Fillon ⚖️, comme ministres de l'Intérieur Guéant ⚖️, Hortefeux ⚖️ et Alliot-Marie ⚖️ et pour amis les Balkany ⚖️. Bref, comme chacun peut le voir ici, le problème, vraiment, c'est Mediapart, hein.
Sarkozy sortant de la salle d'audience.
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Fabrice Arfi @fabricearfi.bsky.social · 29/09/2025
J’étais sur le plateau de BFM où je n’aurais jamais dû aller pour parler de la condamnation de Nicolas Sarkozy. Je n’ai pas eu le temps de rappeler que la seule chose fausse publiée dans cette affaire c’est la rétractation de Takieddine sur les antennes de… BFM: m.youtube.com/watch?v=4yYd...
m.youtube.com
Condamnation de Nicolas Sarkozy: l'interview en intégralité de Fabrice Arfi, journaliste à Mediapart
YouTube video by BFMTV
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The One Piece Podcast @onepiecepodcast.com · 17/09/2025
Grab on to Ryunosuke, as Zou heads to Netflix starting October 1st!
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Alexandre Bertails @alex.bertails.org · 10/08/2025
To most data architects, “An ontology is an explicit description of a conceptualization” is about as useful as “A monad is a monoid in the category of endofunctors” is to most programmers.
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Alexandre Bertails @alex.bertails.org · 09/07/2025
"REST" is our industry's most successful collective delusion: everyone knows it's wrong, everyone knows we're using it wrong, and somehow that works better than being right. news.ycombinator.com/item?id=4450...
news.ycombinator.com
Most RESTful APIs aren't really RESTful | Hacker News
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Don Moynihan @donmoyn.bsky.social · 07/07/2025
"It is kind of, in a way, trying to create a second class of U.S. citizens" - for many of us who immigrated here and became citizens, the message is clear.
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Saikat Chakrabarti @saikatc.bsky.social · 03/07/2025
Small businesses are the backbone of this city! We should do more to make sure that the many great small businesses we have in San Francisco are supported. Let’s make sure that they remain in our community. Thank you Vas Kiniris, for speaking with my team.
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Aaron Rupar @atrupar.com · 02/07/2025
AOC: "On this point of tax on tips, as one of the only people in this body who has lived off of tips, I want to tell you a little bit about the scam ... the cap on that is $25,000 while you're jacking up taxes on people who make less than $50,000 across the US ... while kicking them off the ACA."
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Tina Smith @smith.senate.gov · 30/06/2025
I worked at Planned Parenthood. They diagnose cancers while still treatable. They help women decide what birth control works for them. They help those working through mental health challenges.   Defunding them just harms people who already struggle to find places to get care.
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Alexandre Bertails @alex.bertails.org · 01/07/2025
The piece of code I am the most proud of is called Dupliclef. I wrote it for my dad to be able to save his USB keys and hard-drives. He is old school, but he religiously preserves his data and emails locally by cliquing on the small icon in his Dock. The script then detects the hard drives and keys.
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Alexandre Bertails @alex.bertails.org · 25/06/2025
Computer Science has a lot to learn from Information Science.
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Katie Mack @astrokatie.com · 19/06/2025
Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.
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Alexandre Bertails @alex.bertails.org · 19/06/2025
The same people who tell you that LLMs can reason and manipulate facts will tell you that one cannot prove that a program is correct.
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Saikat Chakrabarti @saikatc.bsky.social · 16/06/2025
Allow me to reintroduce myself: my name’s Saikat Chakrabarti and I’m running for Congress against Nancy Pelosi. Here’s a quick campaign update.
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Alexandre Bertails @alex.bertails.org · 13/06/2025
We believe there is room for standardization in the space. lists.w3.org/Archives/Pub...
lists.w3.org
Model Once, Represent Everywhere: UDA (Unified Data Architecture) at Netflix from Alexandre Bertails on 2025-06-12 (public-shacl@w3.org from June 2025)
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Alexandre Bertails @alex.bertails.org · 12/06/2025
Speaking of, we just published our work on UDA (Unified Data Abstraction) at Netflix. bsky.app/profile/alex...
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Alexandre Bertails @alex.bertails.org · 12/06/2025
This post introduces the foundations of UDA (Unified Data Architecture) as a knowledge graph, connecting domain models to data containers through mappings, and grounded in an in-house metamodel, or model of models, called Upper. netflixtechblog.com/uda-unified-...
netflixtechblog.com
Model Once, Represent Everywhere: UDA (Unified Data Architecture) at Netflix
Introducing UDA, the knowledge-graph-based architecture that translates conceptual domain models into consistent schemas and data…
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Alexandre Bertails @alex.bertails.org · 12/06/2025
We have this super cool new data architecture in Netflix Content and wanted to share it today but we had a technical problem, so the article will only be shared on the Netflix Engineering Blog tomorrow. I hope.🤞
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Alexandria Ocasio-Cortez @aoc.bsky.social · 11/06/2025
I will be damned if I allow a bunch of Confederate-waving January 6th apologists give the American people a lecture on flag waving. There is ZERO reason to enter an argument about patriotism with people who still worship traitors to America 150+ years later. They. Are. Breaking. The. Law.
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Alexandre Bertails @alex.bertails.org · 07/06/2025
Many graph-shaped data problems should be solved using a knowledge graph approach, not a graph db. But graph db vendors sure like to conflate the two.
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