hi, I needed to clarify that I wanted a perl script to read annotations of two .embl files and identify the tags that are the same in the two files hence that copy that line from one file to another, Thanks.

Can you post a sample of your data and what portions you would like to extract?

m.embl FT CDS complement(7216..17805) FT /locus_tag="TP01_0003" FT /codon_start=1 FT /protein_id="XP_765530.1" FT /db_xref="GI:71031777" FT /db_xref="GeneID:3502673" FT gene complement(<7216..>17805) FT /locus_tag="TP01_0003" FT /db_xref="GeneID:3502673" FT mRNA complement(<7216..>17805) FT /locus_tag="TP01_0003" FT /product="hypothetical telomeric SfiI fragment 20 protein FT 3" FT /transcript_id="XM_760437.1" FT /db_xref="GI:71031776" FT /db_xref="GeneID:3502673" FT CDS complement(join(18028..18116,19351..20668)) FT /locus_tag="TP01_0004" FT /note="go_function: nutrient reservoir activity [goid FT 0045735]" FT /codon_start=1 FT /protein_id="XP_765531.1" FT /db_xref="GI:71031779" FT /db_xref="GeneID:3503550" n.embl with FT T.parva_chr1.gb" FT misc_feature 1..1941 FT /note="Automatically generated region of difference with FT T.parva_chr1.gb" FT misc_feature 1..1941 FT /note="Automatically generated region of difference with FT T.parva_chr1.gb" FT misc_feature 3544..16471 FT /note="Automatically generated region of difference with FT T.parva_chr1.gb" FT misc_feature 3544..16471 FT /note="Automatically generated region of difference with FT T.parva_chr1.gb" FT misc_feature 3544..16471 FT /note="Automatically generated region of difference with FT T.parva_chr1.gb" FT CDS complement(join(17937..18025,19259..20576)) FT /note="none" FT /locus_tag="TP01_0004" FT CDS complement(20859..21875) FT /note="none" FT /locus_tag="TP01_0005" Hi David, the above are parts of the embl files am working on . If you check on the indented areas, You will see that they are both CDS features with the same locus tag but one has an empty note. I need to read the same files as arrays and locate the same locus tags then copy the notes from the one with a note to the one that has no notes. THANKS ALOT.