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+#------------------------------------------------------------------------------
+# $File: dyadic,v 1.9 2019/04/19 00:42:27 christos Exp $
+# Dyadic: file(1) magic for Dyalog APL.
+#
+# updated by Joerg Jenderek at Oct 2013
+# https://en.wikipedia.org/wiki/Dyalog_APL
+# https://www.dyalog.com/
+# .DXV Dyalog APL External Variable
+# .DIN Dyalog APL Input Table
+# .DOT Dyalog APL Output Table
+# .DFT Dyalog APL Format File
+0 ubeshort&0xFF60 0xaa00
+# skip biblio.dbt
+>1 byte !4
+# real Dyalog APL have non zero version numbers like 7.3 or 13.4
+>>2 ubeshort >0x0000 Dyalog APL
+>>>1 byte 0x00 aplcore
+#>>>1 byte 0x00 incomplete workspace
+# *.DCF Dyalog APL Component File
+>>>1 byte 0x01 component file 32-bit non-journaled non-checksummed
+#>>>1 byte 0x01 component file
+>>>1 byte 0x02 external variable exclusive
+#>>>1 byte 0x02 external variable
+# *.DWS Dyalog APL Workspace
+>>>1 byte 0x03 workspace
+>>>>7 byte&0x28 0x00 32-bit
+>>>>7 byte&0x28 0x20 64-bit
+>>>>7 byte&0x0c 0x00 classic
+>>>>7 byte&0x0c 0x04 unicode
+>>>>7 byte&0x88 0x00 big-endian
+>>>>7 byte&0x88 0x80 little-endian
+>>>1 byte 0x06 external variable shared
+# *.DSE Dyalog APL Session , *.DLF Dyalog APL Session Log File
+>>>1 byte 0x07 session
+>>>1 byte 0x08 mapped file 32-bit
+>>>1 byte 0x09 component file 64-bit non-journaled non-checksummed
+>>>1 byte 0x0a mapped file 64-bit
+>>>1 byte 0x0b component file 32-bit level 1 journaled non-checksummed
+>>>1 byte 0x0c component file 64-bit level 1 journaled non-checksummed
+>>>1 byte 0x0d component file 32-bit level 1 journaled checksummed
+>>>1 byte 0x0e component file 64-bit level 1 journaled checksummed
+>>>1 byte 0x0f component file 32-bit level 2 journaled checksummed
+>>>1 byte 0x10 component file 64-bit level 2 journaled checksummed
+>>>1 byte 0x11 component file 32-bit level 3 journaled checksummed
+>>>1 byte 0x12 component file 64-bit level 3 journaled checksummed
+>>>1 byte 0x13 component file 32-bit non-journaled checksummed
+>>>1 byte 0x14 component file 64-bit non-journaled checksummed
+>>>1 byte 0x15 component file under construction
+>>>1 byte 0x16 DFS component file 64-bit level 1 journaled checksummed
+>>>1 byte 0x17 DFS component file 64-bit level 2 journaled checksummed
+>>>1 byte 0x18 DFS component file 64-bit level 3 journaled checksummed
+>>>1 byte 0x19 external workspace
+>>>1 byte 0x80 DDB
+>>>2 byte x version %d
+>>>3 byte x \b.%d
+#>>>2 byte x type %d
+#>>>3 byte x subtype %d
+
+# *.DXF Dyalog APL Transfer File
+0 short 0x6060 Dyalog APL transfer