graph structure initial ideas

notes/graph-structure.md

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+# Graph Data Model
+
+- **OpenKnowHow:** Technical documentation needed to build a specific piece of hardware.
+- **OpenKnowWhere:** Manufacturing facilities and their capabilities.
+- **ProcessRequirements:** Specifications defining how raw ingredients must be combined and verified; bridging what needs to be done (OpenKnowHow) with what can be done (OpenKnowWhere).
+- **SupplyTree:** A complete manufacturing solution mapping requirements (OpenKnowHow) to capabilities (OpenKnowWhere) through interconnected workflows represented as DAGs.
+
+---
+
+## The Approach
+
+### Complex Connections
+- **Interconnected Entities:**  
+  - An OpenKnowHow document may be linked to multiple ProcessRequirements.
+  - A ProcessRequirement connects to several manufacturing capabilities within OpenKnowWhere.
+- **Expressive Queries:**  
+  - A property graph naturally captures these interconnections, enabling complex, many-to-many relationships.
+
+### Network and Supply Chain Modeling
+- **Graph Database Strengths:**  
+  - Supply chain logistics involve network-like relationships.
+  - Graph databases excel at traversing networks and finding optimal paths, crucial for matching technical requirements with manufacturing capabilities.
+
+### Knowledge Graph and AI Integration
+- **Unified Data Representation:**  
+  - Modeling the data as a graph allows for integrating disparate data sources into a unified Knowledge Graph.
+- **Downstream Use Cases:**  
+  - Facilitates semantic matching, recommendation engines, and other AI-driven downstream matching layers we discussed.
+
+### Vector Database Integration
+- **Optimized Retrieval:**  
+  - Graph structures complement vector search by storing and retrieving rich metadata.
+- **Dual Approach:**  
+  - Structured queries (property graph) combined with vector similarity searches enhances overall performance.
+
+---
+
+## Graph Data Model Design
+
+### 1. Node Labels and Core Properties
+
+- **OpenKnowHow**
+  - **Label:** `OpenKnowHow`
+  - **Properties:** `id`, `documentRef`, `license`, `materialSpec`, etc.
+  - *Optional:* Break out `DocumentRef`, `License`, and `MaterialSpec` into separate nodes if they require additional relationships.
+
+- **OpenKnowWhere**
+  - **Labels:** `Facility`, `Equipment`, `Location`, `Person`
+  - **Properties:** Each type can include properties such as `id`, `capabilities`, `locationDetails`, etc.
+
+- **ProcessRequirements**
+  - **Label:** `ProcessRequirement`
+  - **Properties:** `id`, `processSpecs`, `verificationCriteria`, etc.
+  - **Role:** Acts as a bridge linking `OpenKnowHow` nodes to capabilities in `OpenKnowWhere`.
+
+- **SupplyTree**
+  - **Labels:** `SupplyTree`, `Workflow`, `WorkflowNode`
+  - **Properties:**
+    - **SupplyTree:** `id`, `description`
+    - **Workflow:** `id`, `order`, etc.
+    - **WorkflowNode:** `id`, `stepDescription`, `dependencies`, etc.
+
+### 2. Relationship Types
+
+- **Linking Technical Documents to Process Requirements:**
+  - `(OpenKnowHow)-[:DEFINES_REQUIREMENT]->(ProcessRequirement)`
+
+- **Connecting Process Requirements to Manufacturing Capabilities:**
+  - `(ProcessRequirement)-[:SUPPORTED_BY]->(Facility)`
+  - Similar relationships can be defined for `Equipment`, `Location`, and `Person` nodes as needed.
+
+- **Mapping the SupplyTree:**
+  - `(SupplyTree)-[:CONTAINS_WORKFLOW]->(Workflow)`
+  - Within a workflow:
+    - `(Workflow)-[:HAS_NODE]->(WorkflowNode)`
+    - `(WorkflowNode)-[:CONNECTED_TO]->(WorkflowNode)` to form the directed acyclic graph (DAG) representing step dependencies.
+
+### 3. Property Graph Advantages
+
+- **Flexibility:**  
+  The schema can evolve with emerging requirements or changes in relationships.
+
+- **Efficient Traversals:**  
+  Graph traversal algorithms efficiently execute complex queries, such as finding all facilities that support a given technical document.
+
+- **Metadata-Rich Relationships:**  
+  Each relationship can include properties (e.g., `timestamp`, `confidenceScore`, `costMetrics`), adding context for AI-driven matching and analytics.
+
+---
+
+## Implementation Considerations
+
+### Schema Design
+- **Planning:**  
+  Start with a comprehensive graph schema diagram that maps nodes, labels, properties, and relationships. This aids in understanding dependencies and planning future integrations.
+
+### Query Examples
+- **Sample Cypher Query:**  
+  To find all manufacturing facilities supporting a specific technical document:
+  ```cypher
+  MATCH (doc:OpenKnowHow {id: 'DOC123'})
+        -[:DEFINES_REQUIREMENT]->(pr:ProcessRequirement)
+        -[:SUPPORTED_BY]->(fac:Facility)
+  RETURN fac
+  ```
+
+### Integration with Vector Databases
+- **Dual Storage:**  
+  Plan integration points where vector embeddings can be linked to nodes (either through vector IDs or as embedded properties) to enhance semantic search capabilities.
+
+### Scalability and Performance
+- **Growth Management:**  
+  Consider graph partitioning or sharding strategies as the network expands, especially if real-time matching and AI processing become computationally intensive.
+
+---