**Collection‑level entity**

@columbia_archival_collection:collection {title: "Columbia Archival Collection", creator: @columbia, year: @date_2023, description: "A collection of archival materials from Columbia, including tutorials on using the Substack editor and a historical analysis of wealth, power, and religious institutions in medieval Europe."}

**Metadata file → collection**

@file_pinax -> metadata -> @columbia_archival_collection

**Documents included in the collection**

@columbia_archival_collection -> includes -> [@substack_editor_tutorials, @modern_indulgence_analysis, @empty_content]

**Places referenced by the collection (from PINAX “place” list)**  

@europe:place {description: "Continent of Europe"}  
@florence:place {region: "Italy"}  
@bruges:place {region: "Belgium"}  
@paris:place {region: "France"}  
@spain:place {region: "Spain"}  
@jerusalem:place {region: "Israel"}  
@rome:place {region: "Italy"}  
@germany:place {region: "Germany"}

@columbia_archival_collection -> related_to -> [@europe, @florence, @bruges, @paris, @spain, @jerusalem, @rome, @germany]

**Concepts / subjects drawn from the PINAX “subjects” list**

@editor_tutorials:concept {description: "Instructional material teaching how to use software tools."}  
@medieval_europe:concept {description: "Historical period and region covering Europe during the Middle Ages."}  
@christianity:concept {description: "World religion based on the life and teachings of Jesus Christ."}  
@wealth_inequality:concept {description: "Unequal distribution of wealth among individuals or groups."}  
@church_history:concept {description: "Historical study of Christian churches and institutions."}  
@social_hierarchy:concept {description: "System of ranking individuals or groups in a society."}  
@economic_history:concept {description: "Study of economies and economic phenomena in the past."}  
@religious_institutions:concept {description: "Organizations and structures associated with religious practice."}  
@historical_analysis:concept {description: "Methodological approach to studying past events."}  
@modern_parallels:concept {description: "Contemporary similarities to historical phenomena."}  
@formatting_options:concept {description: "Various text‑formatting features available in an editor."}

**Collection ↔ subjects**

@columbia_archival_collection -> covers -> [@editor_tutorials, @medieval_europe, @christianity, @wealth_inequality, @indulgence, @church_history, @social_hierarchy, @economic_history, @religious_institutions, @historical_analysis, @modern_parallels, @formatting_options]

**Linking existing documents to their thematic concepts**

@substack_editor_tutorials -> includes -> [@block_quotes, @bold, @italic, @links, @headings, @embeddings, @images, @tweets, @youtube_videos, @vimeo_videos, @spotify_tracks, @soundcloud_tracks, @publish, @publish_and_send, @help_center, @support, @settings_button, @delete_button, @backdate_feature, @email]  
@substack_editor_tutorials -> related_to -> @editor_tutorials  

@modern_indulgence_analysis -> discusses -> [@indulgence, @wealth_inequality, @church_history, @social_hierarchy, @economic_history, @religious_institutions]  
@modern_indulgence_analysis -> uses_methodology -> @historical_analysis  
@modern_indulgence_analysis -> draws_parallel -> @modern_parallels  
@modern_indulgence_analysis -> set_in -> @medieval_europe  

**Synthesis across subdirectories**

- **Cross‑document person linkage**: @nicholas_chimicles (author of @modern_indulgence_analysis) appears only in the *Substack_Posts* subdirectory, but through @columbia_archival_collection we now see his work is part of the same archival collection that also houses the *Substack Editor Tutorials* created by @substack. This connects a medieval‑history scholar with a digital‑publishing platform within a single institutional repository.

- **Temporal‑thematic chain**:  
  @indulgence → originated_in → @crusade {when: @date_1060} → led to → @construction_of_cathedrals → financed by → @indulgence → examined in → @modern_indulgence_analysis → draws_parallel → @modern_nonprofits (contemporary charitable sector).  
  The collection groups these historical and modern strands together, illustrating how medieval financial mechanisms echo today’s nonprofit economics.

- **Conceptual bridge**: The collection’s subjects link *formatting options* (e.g., @block_quotes, @headings) with *historical analysis* concepts (e.g., @wealth_inequality, @church_history). This demonstrates a methodological parallel: just as editors format modern text, scholars structure historical narratives.

- **Geographic coherence**: All places listed in the PINAX metadata (@florence, @bruges, @paris, @spain, @jerusalem, @rome, @germany) are also the geographic focus of the documents within the collection (e.g., @modern_indulgence_analysis discusses Florence, Bruges, etc.). The collection therefore unifies spatial references across the two thematic domains.

- **Organizational linkage**: @substack (creator of the editor tutorials) and @columbia (institution hosting the collection) are both tied to the collection entity, highlighting Columbia’s role in preserving both digital‑media instructional content and scholarly historical research.