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+#------------------------------------------------------------------------------
+# $File: sosi,v 1.2 2021/02/23 00:51:10 christos Exp $
+# SOSI
+# Summary: Systematic Organization of Spatial Information
+# Long description: Norwegian text based map format
+# File extension: .sos
+# Full name: Petter Reinholdtsen (pere@hungry.com)
+# Reference: https://en.wikipedia.org/wiki/SOSI
+#
+# Example SOSI files available from
+# https://trac.osgeo.org/gdal/ticket/3638
+# https://nedlasting.geonorge.no/geonorge/Basisdata/N50Kartdata/SOSI/
+# https://nedlasting.geonorge.no/geonorge/Samferdsel/Elveg/SOSI/
+#
+# Start with optional comments (from "!" to the next line end)
+# followed by ".HODE" and end with "\n.SLUTT" followed by an optional
+# separator (any number of " ", "\t", "\n" or "\r"), might have BOM at
+# the start and following ".HODE" near the start there is "..OMR=C3=85DE"
+# (either UTF-8, ISO-8859-1 or some 7 bit Norwegian charset based on
+# ASCII) , "..TRANSPAR", "..TEGNSETT " followed by the charset and a
+# separator, as well as "..SOSI-VERSJON " followed by the format
+# version and a separator.
+#
+# FIXME figure out how to accept any of [space], [tab], [newline] and
+# [carriage return] as separators, not only line end.
+
+# Not searching for full "OMR=C3=85DE" to match also for non-UTF-8
+# character sets
+0 search ..OMR
+>0 search ..TRANSPAR
+>>0 search .HODE SOSI map data
+>>>&0 search ..SOSI-VERSJON
+>>>>&1 string x \b, version %s
+# FIXME could not figure out way to make a match for .SLUTT at the end required
+#>-7 string \n.SLUTT slutt
+#>-8 string \n.SLUTT\n slutt-nl
+#>-9 string \n.SLUTT\r\n slutt-crnl2
+!:mime text/vnd.sosi
+!:ext sos