[File] [PATCH] Magdir/frame FrameMaker MML; mime type and extension

[Jörg Jenderek (GMX)]

Hello,

some days ago i must handles some old software samples from Adobe
Framemaker. One file sort have file name suffix MML.

So i look on my systems for such files. When running file command
version 5.45 on such samples i get an output like:

chapfmt.mml: FrameMaker MML file
chaptxt.mml: FrameMaker MML file
formats.mml: FrameMaker MML file
sample.mml:  FrameMaker MML file

With option --extension only 3 byte sequence ??? is shown and with -i
option application/x-mif is shown.

For comparison reason i run the file format identification utility
TrID ( See https://mark0.net/soft-trid-e.html). My MML samples are
described as "FrameMaker Maker Markup Language" by mml-fm.trid.xml.
Here now application/vnd.framemaker mime type is shown. For file name
suffix mml is shown (See appended trid-v-mml.txt.gz).

For comparison reason i also run the file format identification
utility DROID ( See https://sourceforge.net/projects/droid/). This
identifies no examples.

On Linux according to shared MIME-info database such samples are called
"Adobe FrameMaker document". Here also application/vnd.framemaker is
used as mime type and no file name suffix is shown. The samples are just
recognized by looking for 4 byte sequence <MML at the beginning. That
information can be seen in source freedesktop.org.xml.in found for
example on gitlab.freedesktop.org.

That informations are now expressed by comment line inside Magdir/frame
like:
# Reference:	http://mark0.net/download/triddefs_xml.7z
#		defs/m/mml-fm.trid.xml
The description happens by lines inside Magdir/frame like:
0	string		\<MML		FrameMaker MML file
!:mime	application/x-mif

So this now becomes like:
0	string		\<MML		FrameMaker MML file
 >5	string		>0		 (%-0.4s)
!:mime	application/vnd.framemaker
!:ext	mml

In 2 of my examples (formats.mml sample.mml) after that directive comes
a space character and a version string like 1.00 and more text. But in 2
of my examples (chapfmt.mml chaptxt.mml) the directive is terminated by
greater sign and end of line. So now show version information if available.

After applying the above mentioned modifications by patch
file-5.45-mml-bfont.diff then all my inspected samplesare still
described but now also possible version inforation is shown. This now
looks like:

chapfmt.mml: FrameMaker MML file
chaptxt.mml: FrameMaker MML file
formats.mml: FrameMaker MML file (1.00)
sample.mml:  FrameMaker MML file (1.00)

I hope my diff file can be applied in future version of file
utility.

With best wishes,
Jörg Jenderek
--
Jörg Jenderek
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--- file-5.45/magic/Magdir/frame.old	2021-02-23 01:49:24.000000000 +0100
+++ file-5.45/magic/Magdir/frame	2023-12-08 01:34:06.445079100 +0100
@@ -46,4 +46,13 @@
 >17	string		1.01		 (%s)
+# Reference:	http://mark0.net/download/triddefs_xml.7z/defs/m/mml-fm.trid.xml
+# Update:	Joerg Jenderek 2023 Nov
+# Note:		called "FrameMaker Maker Markup Language" by TrID and
+#		"Adobe FrameMaker document" by shared MIME-info database from freedesktop.org
 0	string		\<MML		FrameMaker MML file
-!:mime	application/x-mif
+#!:mime	text/plain
+#!:mime	application/x-mif
+!:mime	application/vnd.framemaker
+!:ext	mml
+# Note:		sometimes followed by space and version like 1.00 (formats.mml sample.mml) and more text
+>5	string		>0		 (%-0.4s)
 0	string		\<BookFile	FrameMaker Book file
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