glam/SESSION_SUMMARY_SPARQL_PHASE6_20251122.md

Session Summary: Phase 6 - SPARQL Query Library

Date: 2025-11-22
Schema Version: v0.7.0 (stable, no changes)
Duration: ~45 minutes
Status: ✅ COMPLETE

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What We Did

Phase 6 Goal

Document comprehensive SPARQL query patterns for querying heritage custodian organizational data, collections, and staff relationships.

Deliverable

File: docs/SPARQL_QUERIES_ORGANIZATIONAL.md (1,168 lines)

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What Was Created

1. SPARQL Query Documentation (31 Queries)

Category Breakdown:

• Staff Queries (5): Curators, role changes, expertise matching
• Collection Queries (5): Managing units, temporal coverage, collection types
• Combined Staff + Collection (4): Curator-collection matching, department inventories
• Organizational Change (4): Custody transfers, restructuring impacts, timelines
• Validation Queries (5): SPARQL equivalents of Phase 5 Python validation rules
• Advanced Temporal (8): Point-in-time snapshots, tenure analysis, provenance chains

2. Key Features Documented

✅ SPARQL 1.1 Compliance - All queries use standard syntax
✅ Temporal Query Patterns - Allen interval algebra for date overlaps
✅ Validation Queries - RDF triple store equivalents of Phase 5 rules
✅ Aggregation Queries - AVG, COUNT, SUM for analytics
✅ Optimization Tips - Filter placement, OPTIONAL usage, indexing
✅ Usage Examples - Python rdflib + Apache Jena Fuseki

3. Integration with Previous Phases

Phase 3 (Staff Roles):

• Queries 1.1-1.5 leverage PersonObservation class
• Role change tracking (Query 1.3)
• Expertise matching (Query 1.5)

Phase 4 (Collection-Department Integration):

• Queries 2.1-2.2 use managing_unit ↔ managed_collections
• Bidirectional consistency queries (5.2, 5.5)
• Department inventory reports (Query 3.4)

Phase 5 (Validation Framework):

• All 5 validation rules converted to SPARQL (Queries 5.1-5.5)
• Temporal consistency checks
• Bidirectional relationship validation

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Files Created

1. docs/SPARQL_QUERIES_ORGANIZATIONAL.md (1,168 lines)

   • 31 complete SPARQL queries
   • Expected results + explanations
   • Query optimization guidelines
   • Testing instructions

2. SPARQL_QUERY_LIBRARY_COMPLETE_20251122.md (completion report)

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Key Achievements

1. Comprehensive Query Coverage

• ✅ All 22 classes queryable
• ✅ All 98 slots accessible
• ✅ 5 validation rules in SPARQL
• ✅ 8 advanced temporal patterns

2. Real-World Use Cases

• Department inventory reports
• Staff tenure analysis
• Organizational complexity scoring
• Provenance chain reconstruction

3. Validation Integration

• Python validator (Phase 5) for development
• SPARQL queries for production monitoring
• Complementary approaches

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Technical Highlights

Temporal Query Pattern (Allen Interval Algebra)

# Find entities valid during query period
FILTER(?validFrom <= ?queryEnd)
FILTER(!BOUND(?validTo) || ?validTo >= ?queryStart)

Used in: Queries 1.4, 2.4, 6.1, 6.3

Bidirectional Relationship Validation

# Detect missing inverse relationships
FILTER NOT EXISTS {
  ?unit custodian:managed_collections ?collection
}

Used in: Queries 5.2, 5.5

Provenance Chain Reconstruction

# Trace custody history chronologically
?collection custodian:custody_history ?custodyEvent .
?custodyEvent prov:wasInformedBy ?changeEvent .
ORDER BY ?transferDate

Used in: Queries 4.1, 6.3

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Testing Status

Test Type	Status	Notes
Syntax Validation	✅ COMPLETE	All queries SPARQL 1.1 compliant
Schema Compatibility	✅ COMPLETE	Verified against v0.7.0 RDF schema
Instance Data Testing	⚠️ DEFERRED	Requires YAML→RDF conversion (Phase 7)

Note: Full end-to-end testing requires converting test instances to RDF triples.

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Success Criteria - All Met ✅

Criterion	Target	Achieved	Status
Query Count	20+	31	✅ 155%
Categories	5	6	✅ 120%
Examples	All queries	31/31	✅ 100%
Validation Queries	5 rules	5 queries	✅ 100%
Explanations	Clear	31/31	✅ 100%

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What's Next: Phase 7 - SHACL Shapes

Objective

Convert validation queries into SHACL shapes for automatic RDF validation at data ingestion time.

Why SHACL?

• ✅ Prevent invalid data entry (not just detect)
• ✅ Standardized validation reports
• ✅ Triple store integration (GraphDB, Jena)
• ✅ Detailed error messages

Deliverables (Phase 7)

1. SHACL shape file: schemas/20251121/shacl/custodian_validation_shapes.ttl
2. Documentation: docs/SHACL_VALIDATION_SHAPES.md
3. Validation script: scripts/validate_with_shacl.py

Estimated Time

60-75 minutes

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References

• Query Library: docs/SPARQL_QUERIES_ORGANIZATIONAL.md
• Completion Report: SPARQL_QUERY_LIBRARY_COMPLETE_20251122.md
• Schema (v0.7.0): schemas/20251121/linkml/01_custodian_name_modular.yaml
• Test Data: schemas/20251121/examples/collection_department_integration_examples.yaml
• Phase 5 Summary: SESSION_SUMMARY_VALIDATION_PHASE5_20251122.md

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Phase 6 Status: ✅ COMPLETE
Next Phase: Phase 7 - SHACL Shapes
Overall Progress: 6/9 phases complete (67%)