Markdown Frontmatter Knowledge Graphs
Markdown can become a lightweight knowledge graph when every note carries typed metadata and explicit links.
Site connection
KRAIL builds markdown-frontmatter entities, edges, topic documents, search, think envelopes, and integrity artifacts.
Visual model
Files become typed nodes and edges
The graph demo maps nicely to markdown entities connected by source, task, topic, and evidence relationships.
Interactive
Agent systems are graphs of state, routing, and tool access
A markdown note can carry structured frontmatter:
type: source-note
topic: transit-analysis
project: rutgers-bus-analysis
status: reviewed
links:
- route-loop-time-estimation
- campus-bus-load-curves
The prose remains readable, but the metadata lets software query and connect it.
Why Frontmatter Works
Frontmatter gives plain files just enough structure. You can keep the benefits of Git, grep, and human-readable notes while adding machine-readable type, status, source, and relationship fields.
This is useful for agent work because the agent can search, cite, update, and validate context without needing a heavyweight database for every task.
Graph Edges
Edges can be explicit links, shared tags, source references, task dependencies, or generated backlinks. The important part is that relationships should have meaning, not just visual beauty.
A graph is useful when it answers questions: which claims depend on this source, which tasks are blocked, which topics have stale evidence, and which outputs were verified.
| Node type | Example |
|---|---|
| Source | API docs, paper, dataset note |
| Topic | A concept or research area |
| Task | A work order or investigation |
| Claim | An evidence-backed statement |
| Artifact | Report, chart, code output, wiki page |
Common Pitfalls
- Using tags as decoration instead of queryable structure.
- Creating graph edges without semantics.
- Letting metadata drift from the prose.
- Depending on generated backlinks without validating them.
Quick check
Quiz
Why use frontmatter in markdown notes?
- To make notes queryable while preserving readable files
- To prevent Git from tracking files
- To hide all text
- To replace every database forever
Frontmatter adds structure without giving up plain-text workflows.