knowsys/nemo

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A fast in-memory rule engine

Stars: 291
Forks: 21
Open beginner issues: 0
Indexed issues: 60

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Aug 20, 2026
Latest indexed: Sep 18, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

60 open issues indexed

Add Jupyter kernel for Nemo Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#810 · Opened Aug 24, 2026
Exporting a right-recursive predicate panics with `rowscan.rs:83` index out of bounds (v0.10.1 and main) Open

knowsys/nemo#808 · 1 assignee · Opened Aug 22, 2026
Mixed numeric #min/#max compare storage types instead of values Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

knowsys/nemo#805 · Opened Aug 16, 2026
Support for Stable Toolchain Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

knowsys/nemo#796 · 1 comment · Opened Jul 31, 2026
T2 queries on rules that no longer exist on the code Open

tracing

knowsys/nemo#791 · 1 comment · 1 assignee · Opened Jun 26, 2026
Reset execution engine to blank program, keeping imports Open

api enhancement logical python wasm

knowsys/nemo#784 · 1 reaction · 1 assignee · Opened Apr 13, 2026
Support more aggregates Open

aggregates

Difficulty 4/5 3-5 days Newbie friendliness 48/100

knowsys/nemo#782 · Opened Apr 8, 2026
Allow infix operators in filter terms Open

Parser

knowsys/nemo#779 · 1 assignee · Opened Mar 20, 2026
Integrate rule saturation Open

enhancement logical physical planning engine

knowsys/nemo#775 · 1 assignee · Opened Mar 13, 2026
Transparently handle transformations in tracing Open

tracing transformation

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#774 · 1 comment · Opened Mar 13, 2026
Properly track component provenance during transformations Open

technical-debt transformation

knowsys/nemo#773 · 1 assignee · Opened Mar 13, 2026
Push more filters into SPARQL queries Open

builtins sparql

Difficulty 5/5 Over a week Newbie friendliness 35/100

knowsys/nemo#772 · 2 comments · Opened Mar 13, 2026
Support different (input) arities in sources for the same table Open

io physical

knowsys/nemo#771 · 1 comment · 1 assignee · Opened Mar 10, 2026
Add built-in to strip/trim strings Open

builtins enhancement good first issue

Difficulty 3/5 1-2 days Newbie friendliness 48/100

knowsys/nemo#769 · 1 comment · Opened Mar 6, 2026
Add built-in for string splitting Open

builtins enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

knowsys/nemo#768 · Opened Mar 6, 2026
Feature Request - Non-Blocking Async Execution from within Rust Open

api

Difficulty 5/5 Over a week Newbie friendliness 35/100

knowsys/nemo#767 · 1 comment · Opened Mar 5, 2026
Speeding up inferencing ? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

knowsys/nemo#763 · 10 comments · 1 reaction · Opened Mar 2, 2026
Relax overly strict stratification conditions for aggregates Open

aggregates enhancement program analysis

Difficulty 5/5 Over a week Newbie friendliness 35/100

knowsys/nemo#737 · Opened Oct 30, 2025
List of publications based on Nemo. Open

documentation

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#729 · 1 comment · Opened Oct 20, 2025
Misleading syntax error for malformed local names after prefixes Open

enhancement Parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

knowsys/nemo#719 · 1 comment · Opened Oct 10, 2025
Dump the plan Open

logical planning engine

Difficulty 3/5 1-2 days Newbie friendliness 45/100

knowsys/nemo#718 · 2 comments · Opened Oct 10, 2025
Improve error handling for remote resources Open

enhancement io

Difficulty 4/5 3-5 days Newbie friendliness 35/100

knowsys/nemo#712 · 4 comments · Opened Sep 24, 2025
Add support for complex values (lists, sets, function terms, maps, etc.) Open

builtins enhancement logical physical

knowsys/nemo#699 · 1 reaction · 1 assignee · Opened Sep 11, 2025
Upgrade parser for nom 8 Open

dependency Parser technical-debt

Difficulty 3/5 1-2 days Newbie friendliness 48/100

knowsys/nemo#693 · Opened Jul 11, 2025
Restartable chase with changed program Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#735 · 3 comments · Opened May 14, 2025
question about adding namespaces Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#661 · 10 comments · Opened Apr 16, 2025
Suport more functions Open

builtins

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#642 · 2 comments · Opened Mar 25, 2025
Support dateTime Open

type system

Difficulty 4/5 3-5 days Newbie friendliness 35/100

knowsys/nemo#641 · Opened Mar 25, 2025
Integer division should result in floating point value Open

arithmetic type system

Difficulty 3/5 1-2 days Newbie friendliness 45/100

knowsys/nemo#639 · Opened Mar 25, 2025
Min aggregation does not work correctly for strings Open

aggregates builtins

Difficulty 3/5 1-2 days Newbie friendliness 45/100

knowsys/nemo#638 · 1 comment · Opened Mar 25, 2025
Computing #sum panics when aggregating over non-numeric values Open

bug

knowsys/nemo#632 · 1 assignee · Opened Mar 20, 2025
Allow merging instead of overriding for `--export` CLI parameter Open

enhancement

knowsys/nemo#631 · 5 comments · 1 assignee · Opened Mar 20, 2025
Unbreak hyphenated prefixed names Open

Parser rdf

Difficulty 5/5 Over a week Newbie friendliness 35/100

knowsys/nemo#624 · Opened Feb 27, 2025
Integration testing for remote resources Open

infrastructure tests

Difficulty 4/5 3-5 days Newbie friendliness 45/100

knowsys/nemo#618 · Opened Feb 5, 2025
Integration tests for error messages Open

enhancement tests

Difficulty 4/5 3-5 days Newbie friendliness 35/100

knowsys/nemo#617 · 1 reaction · Opened Feb 5, 2025
Integration Testing Open

infrastructure technical-debt tests

Difficulty 5/5 Over a week Newbie friendliness 20/100

knowsys/nemo#616 · 1 reaction · Opened Feb 5, 2025
Integration tests for non-CSV export formats Open

enhancement technical-debt tests

Difficulty 3/5 1-2 days Newbie friendliness 45/100

knowsys/nemo#614 · Opened Feb 5, 2025
API design for rule program analyses and/or transformations Open

api program analysis question

Difficulty 5/5 Over a week Newbie friendliness 25/100

knowsys/nemo#611 · Opened Feb 4, 2025
Support Safe Rules without Positive Body Atoms Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

knowsys/nemo#608 · 1 comment · Opened Jan 29, 2025
Build static binaries for linux Open

enhancement infrastructure

Difficulty 4/5 3-5 days Newbie friendliness 25/100

knowsys/nemo#607 · 7 comments · Opened Jan 29, 2025
feature: Range builtin Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

knowsys/nemo#599 · 1 comment · Opened Jan 22, 2025
Integration tests for command line arguments Open

io tests

knowsys/nemo#592 · 1 reaction · 1 assignee · Opened Jan 15, 2025
Add Hook for Filtering Atoms Open

enhancement physical planning engine

knowsys/nemo#568 · 1 assignee · Opened Dec 13, 2024
Allow escaping of characters in the delimiter Open

Parser

Difficulty 3/5 1-2 days Newbie friendliness 42/100

knowsys/nemo#560 · 1 comment · Opened Dec 5, 2024
Update JSON import with support for structured DataValues Open

enhancement io logical

knowsys/nemo#557 · 1 assignee · Opened Dec 4, 2024
Save/Load Binary Snapshots of the Database Open

dictionary enhancement physical

knowsys/nemo#556 · 1 assignee · Opened Dec 4, 2024
Support rules without positive atoms Open

enhancement Parser

Difficulty 4/5 3-5 days Newbie friendliness 42/100

knowsys/nemo#555 · Opened Dec 4, 2024
More robust handling of prefixes Open

enhancement Parser

Difficulty 5/5 Over a week Newbie friendliness 35/100

knowsys/nemo#546 · Opened Oct 29, 2024
Improve error messages generated from the parser error tree Open

Parser

knowsys/nemo#523 · 1 assignee · Opened Sep 4, 2024
Make test cases for each error message Open

Parser technical-debt tests

knowsys/nemo#517 · 1 assignee · Opened Aug 28, 2024

knowsys/nemo

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