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Vol.17 No.4
April 2001



The Journal
of the British APL
Association
More eXtreme APL ...
• the VierNeun Puzzle 38
• Barman on Dyalog 9 and XML 48
• Forests in Finland V 66
• John Scholes on “D” 93
• Anne Wilson on Celtic Knotwork 101
• McDonnell’s Erdös Number 113

Contents

EditorialStefano Lanzavecchia3
APL NEWS
Quick Reference Diary5
News from Sustaining Members8
APL Product GuideGill Smith11
The Education Vector
Zark Newsletter Extracts
  Crossword
edited by Jon Sandles26
J-ottings 28: Just say it in JNorman Thomson30
Puzzle CornerStefano Lanzavecchia38
REVIEW
XML in Dyalog APL Version 9Jonathan Barman48
J - the Natural Language for Analytical Computing
[forthcoming book by Norman Thomson]
 65

RECENT MEETINGS
Forests in Finland V (Report and Pictures)Ray Cannon66
The Development and Q/A Process at Microsoft, USKari Höijärvi78
Array-Based LogicKlaus Klug Christiansen85

GENERAL ARTICLES
D: a Functional Subset of Dyalog APLJohn Scholes93
Over and Under: Celtic Knotwork PatternsAnne Wilson101

TECHNICAL SECTION
Technical Correspondence 112
At Play with J: Erdös Numbers and Pierce and Engel ExpansionsGene McDonnell113
A New Life For : Structure ControlF.H.D. van Batenburg125
J Rational Numbers....Gordon Sutcliffe131

Index to Advertisers
143

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