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Extract a pattern from multiple lines in a file

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# 1  
Old 01-09-2013
Extract a pattern from multiple lines in a file
I have a file that has some lines starts with *
I want to get these lines, then get the word between "diac" and "lex".

ex.
file:
Code:
;;WORD AlAx
*0.942490 diac:Al>ax lex:>ax_1 bw:Al/DET+>ax/NOUN+ gloss:brother pos:noun prc3:0 prc2:0 prc1:0 prc0:Al_det per:na asp:na vox:na mod:na gen:m num:s stt:d cas:u enc0:0 rat:y source:spvar stem:>ax stemcat:N0F
--------------
;;WORD gyr
*0.983117 diac:gayoru lex:gayor_1 bw:+gayor/NOUN+u/CASE_DEF_NOM gloss:not;other pos:noun prc3:0 prc2:0 prc1:0 prc0:0 per:na asp:na vox:na mod:na gen:m num:s stt:c cas:n enc0:0 rat:y source:lex stem:gayor stemcat:N

Desired output:
Code:
Al>ax
gayoru


I am not sure if I should use sed or grep. Have been trying for a while, with this command:
Code:
grep -A 3 -o ':.* lex:' boo

I get:
Code:
:Al>ax lex:

Thank you in advance!
# 2  
Old 01-09-2013
Code:
$ nawk -F"[ :]" '/^\*/{for(i=1;i<=NF;i++)if($i~/diac/){print $(i+1);next}}' input.txt
Al>ax
gayoru

if you dont have nawk, then try with awk
# 3  
Old 01-09-2013
Code:
sed -n 's/^*.*diac:\(.*\) lex:.*/\1/p' infile

# 4  
Old 01-09-2013
Code:
awk -F"diac:|lex" '/^*/ {print $2}' infile

# 5  
Old 01-09-2013
On Aix * must be escaped

Code:
#awk -F"diac:|lex" ' /^\*/ {print $2}' file

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