TOtosh·May 21, 2018Submission
Java Datalog Engine with Semi-Naive Evaluation and Stratified Negation
2 points · Open discussionwernsey
Jatalog
Java2018–2018
wernsey / Jatalog
Jatalog
Java Datalog Engine with Semi-Naive Evaluation and Stratified Negation
2Distinct people
2Mentions
0Explicit recommenders
82GitHub stars
What to know before exploring
What it is
Java Datalog Engine with Semi-Naive Evaluation and Stratified Negation
GitHub
Where it is used
No documented product use has been verified yet.
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
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 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 3-hour interval2 dated mentions
Observed mentions: 2018-05-19 19:38:24 UTC to 2018-05-21 19:24:33 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| May 19, 18:00 | 2018-05-19 18:00:00 UTC | 2018-05-19 21:00:00 UTC | 1 | 0 | 1 |
| May 19, 21:00 | 2018-05-19 21:00:00 UTC | 2018-05-20 00:00:00 UTC | 0 | 0 | 0 |
| May 20, 00:00 | 2018-05-20 00:00:00 UTC | 2018-05-20 03:00:00 UTC | 0 | 0 | 0 |
| May 20, 03:00 | 2018-05-20 03:00:00 UTC | 2018-05-20 06:00:00 UTC | 0 | 0 | 0 |
| May 20, 06:00 | 2018-05-20 06:00:00 UTC | 2018-05-20 09:00:00 UTC | 0 | 0 | 0 |
| May 20, 09:00 | 2018-05-20 09:00:00 UTC | 2018-05-20 12:00:00 UTC | 0 | 0 | 0 |
| May 20, 12:00 | 2018-05-20 12:00:00 UTC | 2018-05-20 15:00:00 UTC | 0 | 0 | 0 |
| May 20, 15:00 | 2018-05-20 15:00:00 UTC | 2018-05-20 18:00:00 UTC | 0 | 0 | 0 |
| May 20, 18:00 | 2018-05-20 18:00:00 UTC | 2018-05-20 21:00:00 UTC | 0 | 0 | 0 |
| May 20, 21:00 | 2018-05-20 21:00:00 UTC | 2018-05-21 00:00:00 UTC | 0 | 0 | 0 |
| May 21, 00:00 | 2018-05-21 00:00:00 UTC | 2018-05-21 03:00:00 UTC | 0 | 0 | 0 |
| May 21, 03:00 | 2018-05-21 03:00:00 UTC | 2018-05-21 06:00:00 UTC | 0 | 0 | 0 |
| May 21, 06:00 | 2018-05-21 06:00:00 UTC | 2018-05-21 09:00:00 UTC | 0 | 0 | 0 |
| May 21, 09:00 | 2018-05-21 09:00:00 UTC | 2018-05-21 12:00:00 UTC | 0 | 0 | 0 |
| May 21, 12:00 | 2018-05-21 12:00:00 UTC | 2018-05-21 15:00:00 UTC | 0 | 0 | 0 |
| May 21, 15:00 | 2018-05-21 15:00:00 UTC | 2018-05-21 18:00:00 UTC | 0 | 0 | 0 |
| May 21, 18:00 | 2018-05-21 18:00:00 UTC | 2018-05-21 21:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
2 sourcesAwesome. I look forward to browsing its code.
I implemented a Datalog engine in Java a while back. Looking back on it now there are a bunch of things I might have done differently, but I've never tried to implement anything like it before.
I remember that doing the stratified negation was quite complex and I won't be able to explain it of the top of my head anymore.
Anyway, here's my version: https://github.com/wernsey/Jatalog
In A relatively simple Datalog engine