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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