A JavaScript implementation of OpenCog's AtomSpace knowledge representation system, built using modern ECMAScript standards.

ECMAtomSpace provides a JavaScript implementation of the core concepts from OpenCog's AtomSpace. It enables developers to create, manipulate, and query hypergraphs for knowledge representation and reasoning in web applications.

• Atoms: Base units for knowledge representation
  • Nodes: Represent concepts or entities
  • Links: Connect atoms together to form relationships
• AtomSpace: Hypergraph database for storing and querying atoms
• Truth Values: Represent uncertainty in knowledge
• Attention System: Economic Attention Allocation (ECAN)
  • AttentionValues: Multi-component importance metrics (STI, LTI, VLTI)
  • Attention Allocation: Automatic resource management
  • Activation Spreading: Activation flows through connected atoms

npm install ecmatomspace

import { 
  AtomSpace, ConceptNode, OrderedLink, EvaluationLink,
  AttentionValue 
} from 'ecmatomspace';

// Create an AtomSpace
const atomspace = new AtomSpace();

// Create and add nodes
const person = atomspace.addAtom(new ConceptNode("Person"));
const alice = atomspace.addAtom(new ConceptNode("Alice"));

// Create and add an IsA relationship
const isA = atomspace.addAtom(new EvaluationLink(
  new ConceptNode("IsA"),
  new OrderedLink("ListLink", [alice, person])
));

// Start the ECAN attention allocation system
atomspace.startAttentionAllocation();

// Stimulate an atom (increase its attention)
atomspace.stimulateAtom(alice, 50);

// Later, get the atoms in the attentional focus
const focusAtoms = atomspace.getAttentionalFocus();

The AtomSpace is a hypergraph database that stores atoms (nodes and links) and provides methods for querying and manipulating them.

Atoms are the basic units of knowledge representation in AtomSpace:

• Nodes: Represent concepts or entities (e.g., ConceptNode("Person"))
• Links: Connect atoms together to form relationships (e.g., EvaluationLink)

Truth values represent the degree of confidence in the truth of an atom, with components:

• Strength: How true the atom is (0.0 to 1.0)
• Confidence: How confident we are in the strength value (0.0 to 1.0)

The attention system manages cognitive resources and focuses computation on important atoms:

• Attention Values: Each atom has an attention value with components:

  • STI (Short-Term Importance): Rapidly changing importance value
  • LTI (Long-Term Importance): Slowly changing importance value
  • VLTI (Very Long-Term Importance): Flag to protect against forgetting

• ECAN: Economic Attention Allocation

  • Automatically manages attention values
  • Spreads activation between related atoms
  • Identifies disposable (forgettable) atoms

To set up the development environment:

git clone https://github.com/yourusername/ecmatomspace.git
cd ecmatomspace
npm install
npm run dev

MIT