Sigma

Sigma knowledge engineering system is an system for developing, viewing and debugging theories in first order logic. It works with Knowledge Interchange Format (KIF) and is optimized for the Suggested Upper Merged Ontology (SUMO) www.ontologyportal.org . Sigma has moved to github.com/ontologyportal/sigmakee

Features

natural language generation
theorem proving
ontology browsing

Project Samples

Project Activity

See All Activity >

License

GNU General Public License version 2.0 (GPLv2)

Follow Sigma

Sigma Web Site

nel_h2

Gen AI apps are built with MongoDB Atlas

The database for AI-powered applications.

MongoDB Atlas is the developer-friendly database used to build, scale, and run gen AI and LLM-powered apps—without needing a separate vector database. Atlas offers built-in vector search, global availability across 115+ regions, and flexible document modeling. Start building AI apps faster, all in one place.

Start Free

Rate This Project

User Ratings

5.0 out of 5 stars

★★★★★

★★★★

★★★

★★

★

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5

features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5

design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5

support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 0 / 5

User Reviews

Filter Reviews:

All

nathanfernandez Posted 2013-06-01

Very useful. Thanks.

1 user found this review helpful.
sagaskoog Posted 2012-01-06

Nice tool!

Additional Project Details

Operating Systems

Linux, Windows

Languages

English, German, Hindi, Italian

Intended Audience

Developers, Science/Research

User Interface

Web-based

Programming Language

C++, Java

Related Categories

C++ Artificial Intelligence Software, Java Artificial Intelligence Software

Registered

2004-02-18

Similar Business Software

Pylon

Pylon is an All-in-one B2B Support Platform for modern B2B businesses. We bring together everything a post-sales teams team needs including a ticketing system, B2B omnichannel integrations (Slack Connect, Microsoft Teams), modern chat widget, knowledge base, AI support bot, account...

See Software
Pipefy

Pipefy is the AI-enhanced process automation platform that conserves IT resources and empowers business teams to build and deploy up to 85% of workflows — no coding knowledge or third-party specialized services firms required. Standardize, streamline, and connect workflows for better end-user...

See Software
Prezent

Prezent is a cloud-based AI presentation software designed to optimize the entire process of crafting and delivering presentations. The platform uses AI algorithms to understand the unique needs and styles of each user, tailoring presentations to suit individual preferences and organizational...

See Software
Coursebox AI

Transform your content into engaging eLearning experiences with Coursebox, the #1 AI-powered eLearning authoring tool. Our platform automates the course creation process, allowing you to design a structured course in seconds. Simply make edits, add any missing elements, and your course is ready...

See Software
Stack AI

StackAI is an enterprise AI automation platform to build end-to-end internal tools and processes with AI agents in a fully compliant and secure way. Designed for large organizations, it enables teams to automate complex workflows across operations, compliance, finance, IT, and support without...

See Software
Windsurf Editor

The Windsurf Editor is a free AI-powered IDE and AI coding assistant that accelerates development by providing intelligent code generation and agents in over 70 programming languages and more than 40 IDEs, including VSCode, JetBrains, and Jupyter Notebooks. With Windsurf, developers can write...

See Software