---
title: "Concorde"
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markdown_url: "http://localhost/article/concorde.md"
published_at: "2026-02-08T17:02:46+00:00"
modified_at: "2026-02-08T17:02:46+00:00"
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excerpt: "In the December 93 issue of IQLR (vol. 3 issue 4) Bill Cable describes a group of programs for building a word index of a text file using the facilities of Archive. As I have never had occasion to use Archive I found it quite instructive to take a look at the code (together with…"
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  - name: "International QL Report"
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  - name: "Prolog (programming language)"
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  - name: "Sinclair QL"
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publication_r:
  id: 33740
  title: "International QL Report"
  type: "periodical"
  url: "http://localhost/periodical/international-ql-report/"
authors: "Graham Thwaites"
volume: "4"
issue: "1"
issues_articles:
  - id: 37220
    title: "International QL Report V4 I1"
    type: "issue"
    url: "http://localhost/issue/international-ql-report-v4-i1/"
pages: "58-61"
pubdate: "May/June 1994"
archive_link: false
---

# Concorde

In the December 93 issue of IQLR (vol. 3 issue 4) Bill Cable describes a group of programs for building a word index of a text file using the facilities of Archive. As I have never had occasion to use Archive I found it quite instructive to take a look at the code (together with the odd glance at the relevant section of the QL User Guide). However, my attention was attracted particularly by the comment in Step 4 that “it may take several hours … to index large text files”. As similar functionality can be provided easily in GT-Prolog I thought it might be interesting to make a comparison.