**1. Create the collection entity (extracted from the pinax.json metadata)**  

@posts_collection:collection {  
  title: "Posts Collection",  
  creator: ["@substack", "@nchimicles", "Unknown"],  
  institution: @test_2,  
  created: @date_2017,  
  language: "en",  
  subjects: [  
    "Substack", "Editor Tutorial", "Announcements", "Subscriptions", "Newsletter",  
    "Medieval Europe", "Catholic Church", "Indulgences", "Wealth inequality",  
    "Social hierarchy", "Christianity", "Historical analysis", "Economic history",  
    "Religious history", "Social critique"  
  ],  
  description: "A collection of various posts including tutorials, announcements, and historical essays.",  
  access_url: "PLACEHOLDER",  
  source: "PINAX",  
  rights: "Copyright Substack, Unknown",  
  places: [@europe, @florence, @bruges, @paris, @spain, @jerusalem, @rome, @germany]  
}  

**2. Define new entities needed for synthesis**  

@substack:organization {type: "Publishing platform"}  
@nchimicles:person {full_name: "Nchimicles"}  

@editor_tutorial:concept {description: "Tutorial on using the Substack editor"}  
@announcements:concept {description: "Public notices announcing upcoming content"}  
@subscriptions:concept {description: "Mechanism for readers to receive updates"}  
@newsletter:concept {description: "Periodic email publication"}  
@medieval_europe:concept {description: "European region during the Middle Ages"}  
@catholic_church:organization {description: "The Roman Catholic Church"}  
@christianity:concept {description: "Christian religious tradition"}  
@historical_analysis:concept {description: "Scholarly examination of past events"}  
@economic_history:concept {description: "Study of economies over time"}  
@religious_history:concept {description: "Study of religious developments"}  
@social_critique:concept {description: "Critical examination of social structures"}  

@europe:place {description: "Continent"}  
@florence:place {description: "City in Italy"}  
@bruges:place {description: "City in Belgium"}  
@paris:place {description: "City in France"}  
@spain:place {description: "Country in Europe"}  
@jerusalem:place {description: "City in Israel"}  

**3. Connect the collection to its constituent documents**  

@posts_collection -> includes -> [@substack_editor_tutorial, @coming_soon_announcements, @modern_indulgence, @file_132220171_7fb:document]  

**4. Link collection subjects to the concepts that appear in the individual documents (synthesis across sub‑directories)**  

@posts_collection -> subject -> @substack  
@posts_collection -> subject -> @editor_tutorial  
@posts_collection -> subject -> @announcements  
@posts_collection -> subject -> @subscriptions  
@posts_collection -> subject -> @newsletter  

@posts_collection -> subject -> @medieval_europe  
@posts_collection -> subject -> @catholic_church  
@posts_collection -> subject -> @indulgence_system   # “Indulgences”  
@posts_collection -> subject -> @wealth_inequality  
@posts_collection -> subject -> @social_hierarchy  
@posts_collection -> subject -> @christianity  
@posts_collection -> subject -> @historical_analysis  
@posts_collection -> subject -> @economic_history  
@posts_collection -> subject -> @religious_history  
@posts_collection -> subject -> @social_critique  

**5. Show how the individual documents relate to the same concepts (reinforcing the cross‑source connections)**  

*Substack Editor Tutorial*  

@substack_editor_tutorial -> includes -> [@block_quote, @bold_formatting, @italic_formatting, @link_formatting, @heading_feature, @image_embedding, @tweet_embedding, @youtube_embedding, @vimeo_embedding, @spotify_embedding, @soundcloud_embedding, @settings_button, @publish_option, @publish_and_send_option, @backdating_feature, @help_center, @support_contact]  

*Coming Soon Announcements*  

@coming_soon_announcements -> includes -> @subscribe_now_button:concept {label: "Subscribe now"}  
@subscribe_now_button -> links to -> @nchimicles_substack_subscribe:document {url: "https://nchimicles.substack.com/subscribe?"}  
@nchimicles_substack_subscribe -> hosted by -> @nchimicles_substack:organization {type: "Substack publication"}  

*Modern Indulgence (Historical Essay)*  

@modern_indulgence -> discusses -> @indulgence_system:concept {description: "Medieval Catholic practice of granting remission of temporal punishment for sins in exchange for monetary contributions", start: @date_1060, peak: @date_1300}  
@modern_indulgence -> discusses -> @wealth_inequality:concept {description: "Disparity of wealth between medieval nobility and peasantry"}  
@modern_indulgence -> discusses -> @social_hierarchy:concept {description: "Stratified social order of medieval Europe"}  
@modern_indulgence -> discusses -> @catholic_church:organization  

*Empty Content* (no substantive concepts, but part of the collection)  

@file_132220171_7fb:document -> metadata for -> @empty_content:document {title: "Empty Content", type: "Text", description: "An empty HTML file with no content.", institution: @test_2, source: "PINAX", access_url: "PLACEHOLDER"}  

**6. Geographic synthesis – collection places appear in source documents**  

@posts_collection -> place -> @rome   # appears in @modern_indulgence (St. Peter’s Basilica)  
@posts_collection -> place -> @germany   # appears in @modern_indulgence (cultivated land share)  
@posts_collection -> place -> @europe   # overarching region for medieval essays and Substack content  

**7. Organizational synthesis – Substack as the common platform**  

@substack -> hosts -> @substack_editor_tutorial  
@substack -> hosts -> @coming_soon_announcements  
@substack -> hosts -> @nchimicles_substack_subscribe  

**8. Person‑level synthesis – Nchimicles appears as creator and as subscriber link**  

@nchimicles -> creator of -> @coming_soon_announcements:document  
@nchimicles -> referenced in -> @posts_collection (as one of the collection creators)  

---  

*The graph above extracts the metadata of the pinax.json file, creates a collection entity, and then weaves together the disparate sub‑directory contents (tutorial, announcement, historical essay, and empty file) by linking shared concepts, places, and the Substack platform. This demonstrates the cross‑source relationships that define the “Posts Collection.”*