semantica/docs/index.md

title, description

title	description
Semantica	The Context and Semantic Layer for AI in High-Stakes Domains: Context Graphs · Decision Intelligence · Full Provenance

pip install semantica

Most AI agents store embeddings, not meaning. They can't say why a fact was recalled, where it came from, or what led to a decision. In healthcare, finance, legal, and government, that lack of a traceable record blocks production deployment.

Semantica is the context and semantic layer for AI in high-stakes domains, sitting beneath your existing agent framework. It doesn't replace LangChain or LlamaIndex; it makes their outputs traceable.

What Most AI Stacks Are Missing

No memory structure. Agents store embeddings, not meaning.

• No way to ask why a fact was recalled
• No link from a recalled fact back to its source document
• Context is a black box that resets on every run

No decision trail. Agents act continuously but record nothing.

• No history to hand to a regulator or auditor
• No way to replay or reproduce a past decision
• Debugging means re-running, not reviewing

No provenance. Outputs can't be traced to source facts.

• A hard compliance blocker in healthcare, finance, and legal
• No lineage from inference back to the original document
• No way to demonstrate what the agent actually relied on

No reasoning transparency. Black-box answers with no explanation.

• No way to validate the reasoning path
• No way to contest a specific conclusion
• No basis for improving or correcting future behavior

No conflict detection. Contradictory facts silently coexist in vector stores.

• No detection when two sources disagree
• Outputs become inconsistent and unpredictable over time
• Silent failures compound as the knowledge base grows

What Semantica Adds to Your Stack

Semantica gives every agent the infrastructure it needs to be accountable, and it drops into an existing setup in minutes.

Context Graphs. A structured, queryable graph of everything your agent knows, decides, and reasons about.

• Persistent across agent runs, with no context loss between sessions
• Queryable with SPARQL and full graph algorithms
• Temporal model with valid_from / valid_until on nodes and edges
• Point-in-time snapshots of the full knowledge state

Decision Intelligence. Every decision is a first-class object in your system.

• record_decision() captures full lifecycle and causal chain
• Hybrid precedent search over past decisions for consistency
• analyze_decision_impact() shows downstream consequences
• Causal chain visualization from trigger to outcome

Full Provenance. Every fact links to its source document and ingestion event.

• W3C PROV-O compliant lineage across all modules
• Full traceability from raw input to final inference
• recorded_at stamping with OWL-Time export
• Audit-ready for HIPAA, SOX, GDPR, FDA 21 CFR Part 11

Reasoning Engines. Explainable reasoning paths, not black boxes.

• Forward chaining, Rete, deductive, abductive
• SPARQL query-based inference over RDF graphs
• Datalog with recursive Horn clause rules
• Every conclusion backed by a traceable derivation path

Temporal Intelligence. Your graph knows not just what, but when.

• Allen interval algebra covering all 13 temporal relations
• Point-in-time queries over historical graph states
• Temporal provenance stamping on every fact
• OWL-Time export for standards-compliant archiving

Ontology Hub. Full ontology lifecycle in the browser.

• Visual editor for schema design and editing
• SHACL Studio for constraint authoring and validation
• Alignment authoring across multiple ontologies
• Health dashboard and version control built in

Works alongside any LLM provider and any agent framework. Add it to an existing stack without changing your architecture.

<img src="/assets/img/diagrams/architecture-overview.svg" alt="Semantica four-layer architecture: Ingestion → Processing → Intelligence → Application" style={{ width: '100%', borderRadius: '12px', margin: '24px 0' }} />

See It In Action

One pip install. A few lines to connect your agent. Everything else becomes traceable.

pip install semantica

from semantica.context import AgentContext, ContextGraph
from semantica.vector_store import VectorStore
from semantica.llms import OpenAI

context = AgentContext(
    vector_store=VectorStore(backend="faiss", dimension=1536),
    knowledge_graph=ContextGraph(advanced_analytics=True),
    decision_tracking=True,
    llm=OpenAI(model="gpt-4o"),
)

context.store("GPT-4 outperforms GPT-3.5 on reasoning benchmarks by 40%")

decision_id = context.record_decision(
    category="model_selection",
    scenario="Choose LLM for production reasoning pipeline",
    reasoning="GPT-4 benchmark advantage justifies 3x cost increase",
    outcome="selected_gpt4",
    confidence=0.91,
)

precedents = context.find_precedents("model selection reasoning", limit=5)
influence  = context.analyze_decision_influence(decision_id)

from semantica.context import AgentContext, ContextGraph
from semantica.vector_store import VectorStore
from semantica.llms import LiteLLM
import os

context = AgentContext(
    vector_store=VectorStore(backend="faiss", dimension=1024),
    knowledge_graph=ContextGraph(advanced_analytics=True),
    decision_tracking=True,
    llm=LiteLLM(model="anthropic/claude-opus-4-7", api_key=os.getenv("ANTHROPIC_API_KEY")),
)

context.store("Claude excels at long-context reasoning and code generation")

decision_id = context.record_decision(
    category="model_selection",
    scenario="Choose LLM for document analysis pipeline",
    reasoning="Claude's 200k context window eliminates chunking overhead",
    outcome="selected_claude",
    confidence=0.94,
)

precedents = context.find_precedents("document analysis model", limit=5)

from semantica.context import AgentContext, ContextGraph
from semantica.vector_store import VectorStore
from semantica.llms import LiteLLM

context = AgentContext(
    vector_store=VectorStore(backend="faiss", dimension=768),
    knowledge_graph=ContextGraph(advanced_analytics=True),
    decision_tracking=True,
    llm=LiteLLM(model="ollama/llama3.2", base_url="http://localhost:11434"),
)

# Fully local: no data leaves your infrastructure
context.store("Local LLMs enable air-gapped compliance deployments")

decision_id = context.record_decision(
    category="deployment_model",
    scenario="Choose inference strategy for on-prem environment",
    reasoning="Air-gap requirement eliminates cloud API options",
    outcome="local_inference",
    confidence=0.99,
)

• Full Quickstart: step-by-step pipeline walkthrough
• Cookbook: 40+ real-world Jupyter notebooks
• Join Discord: community chat and support

Industry Use Cases

Semantica is used in domains where every decision must be explainable and every fact must be traceable.

**This is system-level explainability, not foundation-model explainability.** Semantica does not expose, reconstruct, or explain what happens *inside* the LLM/foundation model. Its internal reasoning or chain-of-thought stays opaque, as it does for any external system. What Semantica explains is *outside* the model: the context and data fed in, the decision produced, its provenance, the relevant relationships, the policies applied, and the full execution trail. See [Core Concepts](/concepts) for the full scope note.

Healthcare & Life Sciences

• Clinical decision support with full audit trails
• Drug interaction and contraindication graphs
• Patient safety event tracking and root-cause analysis
• HIPAA-compliant provenance chains out of the box

Finance & Risk

• Fraud detection knowledge graphs
• Risk assessment trails built to survive an audit
• SOX, GDPR, and MiFID II compliance infrastructure
• Model decision lineage for regulatory reporting

Legal & Compliance

• Evidence-backed research with every cited fact provenance-linked
• Contract analysis with traceable clause extraction
• Regulatory change tracking across jurisdictions
• Full reasoning paths ready for court-admissible documentation

Cybersecurity

• Threat attribution graphs linking actors, TTPs, and indicators
• Incident response timelines with full event provenance
• Security audit trails across the complete kill chain
• MITRE ATT&CK-aligned knowledge graph integration

Government & Defense

• Policy decision trails from brief to outcome
• Classified information handling with provenance chains
• Chain-of-custody scrutiny for intelligence reporting
• Air-gapped deployment with local LLM support

Critical Infrastructure

• Power grid state tracking with temporal intelligence
• Transportation safety event graphs
• Emergency response coordination with decision audit trails
• Consequence modeling for high-stakes operational decisions

Start Here

```bash pip install semantica ``` See [Installation](/installation) for optional extras (`[all]`, `[neo4j]`, `[pinecone]`) and environment setup. Build a complete knowledge graph pipeline in [5 minutes](/quickstart): - Ingest documents from any source - Extract entities and relationships - Build and query the graph - Record and trace a decision [Core Concepts](/concepts) covers: - Knowledge graphs vs. vector stores: when to use each - What GraphRAG is and how Semantica implements it - How provenance and decision tracking work together - The context and semantic layer architecture Every module has a dedicated [reference page](/reference/context) with: - Full class and method documentation - Parameter tables with types and defaults - Runnable code examples for each feature

• Installation: get Semantica installed in under a minute
• Quickstart: build a complete knowledge graph pipeline in 5 minutes
• Core Concepts: the mental model behind the API
• API Reference: exact module, class, and method details
• Cookbook: domain notebooks for real-world use cases
• Changelog: release history

Full Capabilities

Context Graphs

• Structured, persistent graph of entities, relationships, and decisions
• Temporal model with valid_from / valid_until on every node and edge
• Point-in-time queries across historical graph states
• Distance Intelligence: semantic neighborhoods and N×N distance matrices

Decision Tracking

• record_decision() with full lifecycle management and causal chains
• Hybrid similarity search over past decisions for consistency enforcement
• analyze_decision_impact() and analyze_decision_influence() for consequence modeling
• Ego-mode exploration for targeted neighborhood investigation

Entity & Relation Extraction

• Named entity recognition: pattern, ML, or LLM methods
• Typed triplet extraction via LLM or rule-based pipelines
• Event extraction with temporal and causal linking

Ontology & Schema

• Ontology Hub: visual editor, SHACL Studio, alignments, health dashboard
• Deduplication v2: blocking_v2, hybrid_v2, semantic_v2: up to 7x faster
• Datalog reasoning: recursive Horn clause rules with fixpoint semantics
• SPARQL reasoning: query-based inference over RDF graphs

Lineage Tracking

• W3C PROV-O lineage across all modules: every fact has a source
• recorded_at stamping with full OWL-Time export
• Change management with SHA-256 checksums and version control
• Full audit trails from ingestion event to final inference

Compliance Infrastructure

• HIPAA: patient data handling with audit-ready provenance chains
• SOX / MiFID II: financial decision records with full traceability
• GDPR: data lineage for subject access and right-to-erasure workflows
• FDA 21 CFR Part 11: electronic records and signature compliance

Ingestion Formats

• Documents: PDF, DOCX, HTML, PPTX, Docling layout analysis
• Structured data: JSON, CSV, Excel, Parquet, XML
• Sources: web crawl, SQL, Snowflake, feeds, email, code repositories, MCP

Vector Stores

• FAISS, Pinecone, Weaviate, Qdrant, Milvus, PgVector, in-memory

Graph Stores

• Neo4j, FalkorDB, Apache AGE, Amazon Neptune

Export Formats

• RDF: Turtle, JSON-LD, N-Triples, RDF/XML
• Tabular: Parquet, CSV, Arrow
• Graph: GraphML, GEXF, DOT, ArangoDB AQL
• Ontology: OWL, SKOS, SHACL

Module Reference

Module	What it provides
semantica.context	Context graphs, agent memory, decision tracking, causal analysis, precedent search
semantica.kg	KG construction, graph algorithms, temporal model, Allen interval algebra
semantica.semantic_extract	NER, relation extraction, event extraction, triplet generation
semantica.reasoning	Forward chaining, Rete, deductive, abductive, SPARQL, Datalog
semantica.ontology	SHACL, SKOS, alignments, diff/migration, auto-generation, OWL/RDF
semantica.explorer	FastAPI Knowledge Explorer, Ontology Hub, Distance Intelligence, SHACL Studio
semantica.mcp_server	MCP stdio server: 15 tools for Claude Desktop, VS Code, Cursor, Windsurf, Cline
semantica.vector_store	FAISS, Pinecone, Weaviate, Qdrant, Milvus, PgVector
semantica.graph_store	Neo4j, FalkorDB, Apache AGE, Amazon Neptune
semantica.triplet_store	In-memory and persistent RDF triple store with SPARQL
semantica.ingest	Files, web, feeds, databases, Snowflake, Parquet, XML, MCP
semantica.parse	Document parsing: PDF, DOCX, HTML, PPTX, Docling layout analysis
semantica.split	Text chunking: sentence, paragraph, token, semantic boundary strategies
semantica.normalize	Text normalization, entity canonicalization, whitespace and encoding cleanup
semantica.embeddings	Sentence-Transformers, FastEmbed, OpenAI, BGE, Ollama local embeddings
semantica.pipeline	Pipeline DSL, parallel workers, retry policies, failure handling
semantica.export	RDF, Parquet, ArangoDB AQL, CSV, OWL, Arrow, GraphML, GEXF, DOT
semantica.visualization	Programmatic graph rendering: force, hierarchical, circular, spring layouts
semantica.deduplication	Entity deduplication v1/v2, similarity scoring, blocking, merging
semantica.conflicts	Conflict detection and resolution across overlapping knowledge sources
semantica.provenance	W3C PROV-O lineage tracking, source attribution, audit trails
semantica.change_management	Version control with SHA-256 checksums, diff, rollback
semantica.llms	Groq, OpenAI, Anthropic, Gemini, Ollama, DeepSeek, Novita AI, LiteLLM, HuggingFace
semantica.seed	Foundation graph seeding from CSV, JSON, SQL, API, and RDF sources
semantica.evals	Evaluation harness: KG quality, extraction F1, pipeline benchmarking, regression tracking
semantica.core	Orchestration, ConfigManager, LifecycleManager, PluginRegistry, MethodRegistry
semantica.utils	Logging, validation, progress tracking, hash utilities, nested dict helpers

Why Semantica?

Open Source, MIT. No vendor lock-in, no paywalled features.

• Full source available on GitHub
• Every line auditable by your security team
• Fork, extend, and self-host with no restrictions
• No telemetry, no usage reporting

Production Ready. Built for teams that can't afford surprises.

• 1,000+ passing tests with full regression coverage
• PipelineValidator catches configuration errors at startup
• FailureHandler with exponential backoff and dead-letter queues
• Ongoing security hardening, with fixes shipped in every release (CHANGELOG)

Modular by Design. Import only what you need.

• Use NERExtractor without a graph store
• Use ContextGraph without vector storage
• Every component independently swappable and testable
• No framework lock-in, and works with any agent stack