{
  "study_id": "PDF-PAIRS-2026-10-04",
  "research_completed_at_utc": "2026-10-04T17:06:54.316222+00:00",
  "format": "five paired examples; fewer than six qualifying companies",
  "preregistered_protocol_unchanged": true,
  "amendment": "Read-only public PDF page-range selection clarified before use; no contact form submitted.",
  "parent_companies": 12,
  "parent_product_pages": 36,
  "paired_companies": 5,
  "selected_ids": [
    "PC02",
    "CL01",
    "NO01",
    "UL01",
    "GA01"
  ],
  "selection_outcomes": {
    "no_candidate_in_parent_sample": 5,
    "no_verified_product_match": 1,
    "included": 5,
    "retrieval_limit": 1
  },
  "selected_pdf_pages_total": 25,
  "selected_pdfs_with_extractable_text": 4,
  "selected_pdfs_without_extractable_text": 1,
  "field_format_observations": 60,
  "matrix": [
    {
      "id": "PC02",
      "company": "Pacron",
      "identifier": "F13248",
      "cells": {
        "model": "both",
        "dimensions": "both",
        "material": "both",
        "compatibility": "neither_observed",
        "technical_document": "both",
        "next_action": "both"
      }
    },
    {
      "id": "CL01",
      "company": "Carr Lane Manufacturing",
      "identifier": "CL-1-LP-ZC",
      "cells": {
        "model": "both",
        "dimensions": "both",
        "material": "both",
        "compatibility": "both",
        "technical_document": "both",
        "next_action": "html_only"
      }
    },
    {
      "id": "NO01",
      "company": "norelem",
      "identifier": "01040-01",
      "cells": {
        "model": "both",
        "dimensions": "units_unresolved",
        "material": "both",
        "compatibility": "both",
        "technical_document": "both",
        "next_action": "html_only"
      }
    },
    {
      "id": "UL01",
      "company": "USA Lab",
      "identifier": "UGL20",
      "cells": {
        "model": "both",
        "dimensions": "html_only",
        "material": "html_only",
        "compatibility": "both",
        "technical_document": "both",
        "next_action": "html_only"
      }
    },
    {
      "id": "GA01",
      "company": "Galco",
      "identifier": "69 Series / PE69",
      "cells": {
        "model": "both",
        "dimensions": "both",
        "material": "neither_observed",
        "compatibility": "both",
        "technical_document": "both",
        "next_action": "html_only"
      }
    }
  ],
  "interpretation": [
    "Availability is different from depth: a PDF can add accessory detail even when both formats mention compatibility.",
    "Carr Lane has material, dimensions and cable detail in both formats; opening ordinary sections matters.",
    "The USA Lab pair has information in each direction and an unresolved 10-versus-100 program description.",
    "The selected Pacron PDF yields no extractable text in this tool; this is not a Google indexing test.",
    "A PDF label does not establish a product match: Flow-Eze links to a generic technical reference.",
    "Units and document versions need explicit verification before transferring specifications."
  ],
  "limits": [
    "Five convenience-sample examples reused from B2B-36; not an independent or representative US-market sample.",
    "Three exact listed variants, one base-model match with brand-prefix normalization, and one explicitly qualified series-level match.",
    "LabRepCo files returned 403 to the collector; no claim about access for all visitors.",
    "The Carr Lane PDF is a one-page export, not an audit of its full catalog.",
    "Not-observed fields refer only to reviewed HTML states and selected PDF pages/files.",
    "Product compatibility and specification truth were not physically tested or confirmed by suppliers.",
    "Same researcher recheck, without independent coding.",
    "No ranking, indexing, AI-citation, traffic, conversion or user-speed measurements.",
    "Technical-document access is a structural navigation task and must not enter a format quality score.",
    "No third-party PDF or full copied HTML text is included in public downloads."
  ],
  "recommended_title": "PDF Catalogs vs HTML for B2B SEO: Five Product Comparisons",
  "article_written": false
}