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Hamza Khan

Case study ยท Document intelligence and legal knowledge system

Legal Document and Knowledge Intelligence System

An anonymized document and knowledge architecture designed for grounded retrieval, source visibility, structured relationships, and permissions-aware access.

Hamza Khan โ€” Senior Full-Stack & AI EngineerBy Hamza Khan2 min read
Illustration: firm documents are split into text chunks, linked in a knowledge graph and turned into an answer that cites its sources, marked for lawyer review.
Anonymized AI and knowledge engineering.
System
Document intelligence and legal knowledge system
On this page

The problem

This system experience centered on transforming approved legal documents and structured information into a reusable knowledge layer while preserving the distinction between source material and generated output. Important legal knowledge is often distributed across documents and systems, while generic search and chat experiences can miss context, permissions, and source evidence.

  • Important knowledge is spread across documents and systems.
  • Traditional keyword search can miss relationships and context.
  • Generic chat interfaces may answer without sufficient grounding.
  • Permissions must apply during retrieval.
  • Attorneys need visible sources, not unsupported output.

Who controls what

  1. Step 1

    Authorization applied before and during retrieval.

  2. Step 2

    Document identity and citations preserved through the response path.

  3. Step 3

    Human review retained before consequential use.

  4. Step 4

    Retrieval and response quality evaluated separately.

Open the control diagram

How it is built

Document intelligence and legal knowledge system, shown as 7 ordered layers: Approved sources, Ingestion, Processing, Knowledge layer, Retrieval, AI response, Human review.

  1. Approved sources

    then
  2. Ingestion

    then
  3. Processing

    then
  4. Knowledge layer

    then
  5. Retrieval

    then
  6. AI response

    then
  7. Human review

Document intelligence and legal knowledge system, shown as 7 ordered layers: Approved sources, Ingestion, Processing, Knowledge layer, Retrieval, AI response, Human review.

Engineering decisions

  • Separate source from generation: Store and present approved source documents independently from model-generated summaries or answers.
  • Preserve citation identity: Carry document, section, and retrieval context through the response so reviewers can return to the source.
  • Authorize retrieval: Apply user and matter permissions when selecting candidate information, not only after output is generated.
  • Combine retrieval signals: Use semantic retrieval with structured metadata when either method alone loses necessary context.
  • Model relationships explicitly: Use graphs or ontologies where entities and relationships are central to the legal question.
  • Evaluate the stages separately: Measure retrieval relevance independently from response grounding and usefulness.

What the team sees

Illustrative legal document search workspace showing a lease-notice answer beside cited source passages with fictional data.

Illustration, fictional data

Reconstructed interface with fictional data. It illustrates the delivered workflow; it is not a client screenshot.

My role and scope

What I owned

  • Document-processing architecture
  • RAG and retrieval design
  • Knowledge modeling
  • Permissions-aware access
  • Citation traceability
  • Evaluation design
  • Application integration
  • Operational monitoring

What was built

  • Document ingestion
  • Text extraction and normalization
  • Classification and structured metadata
  • Chunking and indexing
  • RAG retrieval and source citations
  • Knowledge relationships and ontology support
  • Permissions-aware search
  • Human review
  • Feedback and evaluation
  • Legal document processing
  • RAG architecture
  • Knowledge graphs and ontologies
  • Permissions-aware retrieval
  • Evaluation and traceability

Outcome

The system was designed to transform approved legal information into a searchable and reusable knowledge layer while maintaining source visibility and access boundaries.

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