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sed selective data parsing

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# 1  
Old 03-28-2009
sed selective data parsing
i have file in the following format
*RECORD*
*FIELD NO*
123456
*FIELD TX*
this is a sample entry
*FIELD SA*
See Also
*FIELD RF*
References
*FIELD CS*
Clinical Symptoms
*FIELD AV*
Allelic Variants
*FIELD EH*
Edit History

*RECORD*
*FIELD NO*
123456
*FIELD TX*
this is a sample entry
*FIELD RF*
There is no "SA" field, just References
*FIELD CS*
Clinical Symptoms. There are no allelic variants (AV) field
*FIELD EH*
Edit History

1) How to parse this data using SED?
2) Extract field, if available

Any input if available
# 2  
Old 03-29-2009
No duplicate or cross-posting, read the rules.

Proceed here: https://www.unix.com/shell-programmin...een-lines.html

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