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Datomic
fressian
Java2012–2020
Datomic / fressian

fressian

Discover this repository through its Hacker News conversations.

Explore on GitHubRead Hacker News discussions
6Distinct people
6Mentions
0Explicit recommenders
277GitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

A public description has not been verified.

Where it is used

No documented product use was verified in the last source check.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year6 dated mentions

Observed mentions: 2012-12-07 18:48:13 UTC to 2020-10-23 18:37:21 UTC.

012342012-01-01 00:00:00 UTC to 2013-01-01 00:00:00 UTC (exclusive): 1 mentions; 1 submissions, 0 comments20122013-01-01 00:00:00 UTC to 2014-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2014-01-01 00:00:00 UTC to 2015-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2015-01-01 00:00:00 UTC to 2016-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2016-01-01 00:00:00 UTC to 2017-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments20162017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 4 mentions; 0 submissions, 4 comments2020

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20122012-01-01 00:00:00 UTC2013-01-01 00:00:00 UTC110
20132013-01-01 00:00:00 UTC2014-01-01 00:00:00 UTC000
20142014-01-01 00:00:00 UTC2015-01-01 00:00:00 UTC101
20152015-01-01 00:00:00 UTC2016-01-01 00:00:00 UTC000
20162016-01-01 00:00:00 UTC2017-01-01 00:00:00 UTC000
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC000
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC000
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC000
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC404

What Hacker News says

6 sources
puredanger·Jun 5, 2020
This is great, thanks for doing that! It would be great to add this history of Clojure paper. There is also a C++ paper he wrote (http://www.tutok.sk/fastgl/callback.html). Other things Rich has made: - ClojureScript (https://clojurescript.org/) - Datomic database (https://www.datomic.com/) - edn data format (https://github.com/edn-format/edn) - extensible data notation (subset of Clojure's syntax) - Transit (https://github.com/cognitect/transit-format) - format for conveying values between languages - Fressian (https://github.com/Datomic/fressian) - extensible binary data notation, used by Datomic - REBL (http://rebl.cognitect.com/download.html) - graphical tool for browsing Clojure data - Codeq (https://github.com/Datomic/codeq) - Clojure+Datomic application to do code-aware queries on git repos List of talk transcripts:
Read the rest
https://github.com/matthiasn/talk-transcripts/tree/master/Hi... Playlist of many talks on YT: https://www.youtube.com/playlist?list=PLZdCLR02grLrEwKaZv-5Q... pre-Clojure projects: - http://jfli.sourceforge.net/ - http://foil.sourceforge.net/
In A History of Clojure [pdf]
lnmx·Jul 22, 2014
So, EDN [1] is a formalization of Clojure data-literal syntax that includes tagged types, has a text representation, and no built-in caching. Fressian [2] supports the same types and extensibility as EDN, has a compact binary encoding, and the serializer/writer can choose its own caching strategy (so-called domain-specific caching[3]). I believe it was created to provide a serialization format for Datomic. Transit sounds like an evolution of EDN and Fressian: make the bottom layer pluggable to support human-readable/browser-friendly JSON or use the well-established msgpack for compactness. Caching is still there, but it can only be used for keywords/strings/symbols/etc. instead of arbitrary values like Fressian -- probably a good trade-off for simplicity. [1]: http://edn-format.org [2]: http://fressian.org [3]: https://github.com/Datomi
Read the rest
c/fressian/wiki/Caching
In Transit – A format for conveying values between different languages

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