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# 1  
Old 02-18-2010
New Member - First Question
Here is my situation...

System - HP UNIX (HP-UX hq5 B.11.00 U 9000/800 (td))

I have an HL7 (Health Level Seven) pipe-delimied file that does not have any carriage returns/line feeds. I need to insert a line feed before each segment type (MSH, PID, PV1, OBX, etc.) so that my PROGRESS program can read each line and determine the segment type for processing.

Input file looks like this:

Code:
MSH|data|data|data|data|data|data|data|PID|data|data|data|data|PV1|data|data|OBX|data|data|...

I need a command (I've tried sed) to convert the file to look like this:

Code:
MSH|data|data|data|data|data|data|data|
PID|data|data|data|data|
PV1|data|data|
OBX|data|data|...

If anyone can give me a command to do this, I will be most grateful.
Last edited by zxmaus; 02-18-2010 at 03:37 PM.. Reason: added code tags
# 2  
Old 02-18-2010
sed, awk, and other such line-based tools probably aren't going to be much help, they can't handle lines over a relatively small maximum size.

If your shell's read command supports the -d option:
Code:
while read -d '|' DATA
do
        if [ "$DATA" == "MSH" ] || [ "$DATA" == "PID" ] ||
                [ "$DATA" == "PV1" ] || [ "$DATA" == "OBX" ]
        then
                echo -en "\n${DATA}"
        else
                echo -n "|${DATA}"
        fi
done < datafile

echo

# 3  
Old 02-18-2010
Dear Corona,

Thanks for the help but my system does not support the -d option on the read command.

I think you are correct as to why the 'sed' command doesn't work. My HL7 file is almost 1.5 MB.

Any other suggestions?
# 4  
Old 02-18-2010
Could you explain how can we distinguish between segment type and data?
Is it the case - upper/lower?
# 5  
Old 02-18-2010
Quote:
Originally Posted by Corona688
sed, awk, and other such line-based tools probably aren't going to be much help, they can't handle lines over a relatively small maximum size.
I don't think sed has any such limit. It's a stream editor, not a line editor.

Code:
sed 's/|\([MSH|PID|PV1]\)/\|\
\1/g' file1

MSH|data|data|data|data|data|data|data|
PID|data|data|data|data|
PV1|data|data|OBX|data|data|
....

# 6  
Old 02-18-2010
Quote:
Originally Posted by scottn
I don't think sed has any such limit. It's a stream editor, not a line editor.
This is implementation-dependent. GNU sed doesn't. The sed FAQ details what versions have what limitations but it's not clear which version is what HPUX has.

Don't you need -r for brackets and backreferences?
# 7  
Old 02-18-2010
HPUX 11.00

Code:
what /usr/bin/sed

/usr/bin/sed:

         $Revision: 80.5 $
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