Yep, here is the first part, after the <Iteration_hits> there are lots of <Hit>-s, all with exactly the same structure, so I kept only the first two. The point is to search in the <Hit_def> of these <Hit>-s, but in the output we'd like to see the <Hit_num> and <Hsp_identity> attributes of the matching <Hit>-s too.

<?xml version="1.0"?>
<!DOCTYPE BlastOutput PUBLIC "-//NCBI//NCBI BlastOutput/EN" "http://ww
+w.ncbi.nlm.nih.gov/dtd/NCBI_BlastOutput.dtd">
<BlastOutput>
  <BlastOutput_program>blastn</BlastOutput_program>
  <BlastOutput_version>BLASTN 2.2.29+</BlastOutput_version>
  <BlastOutput_reference>Stephen F. Altschul, Thomas L. Madden, Alejan
+dro A. Sch&amp;auml;ffer, Jinghui Zhang, Zheng Zhang, Webb Miller, an
+d David J. Lipman (1997), &quot;Gapped BLAST and PSI-BLAST: a new gen
+eration of protein database search programs&quot;, Nucleic Acids Res.
+ 25:3389-3402.</BlastOutput_reference>
  <BlastOutput_db>nr</BlastOutput_db>
  <BlastOutput_query-ID>96197</BlastOutput_query-ID>
  <BlastOutput_query-def>No definition line</BlastOutput_query-def>
  <BlastOutput_query-len>16</BlastOutput_query-len>
  <BlastOutput_param>
    <Parameters>
      <Parameters_expect>1000</Parameters_expect>
      <Parameters_sc-match>1</Parameters_sc-match>
      <Parameters_sc-mismatch>-3</Parameters_sc-mismatch>
      <Parameters_gap-open>5</Parameters_gap-open>
      <Parameters_gap-extend>2</Parameters_gap-extend>
      <Parameters_filter>F</Parameters_filter>
    </Parameters>
  </BlastOutput_param>
<BlastOutput_iterations>
<Iteration>
  <Iteration_iter-num>1</Iteration_iter-num>
  <Iteration_query-ID>96197</Iteration_query-ID>
  <Iteration_query-def>No definition line</Iteration_query-def>
  <Iteration_query-len>16</Iteration_query-len>
<Iteration_hits>
<Hit>
  <Hit_num>1</Hit_num>
  <Hit_id>gi|410994849|gb|CP003920.1|</Hit_id>
  <Hit_def>Uncultured Sulfuricurvum sp. RIFRC-1, complete genome</Hit_
+def>
  <Hit_accession>CP003920</Hit_accession>
  <Hit_len>2358861</Hit_len>
  <Hit_hsps>
    <Hsp>
      <Hsp_num>1</Hsp_num>
      <Hsp_bit-score>32.2105</Hsp_bit-score>
      <Hsp_score>16</Hsp_score>
      <Hsp_evalue>21.4857</Hsp_evalue>
      <Hsp_query-from>1</Hsp_query-from>
      <Hsp_query-to>16</Hsp_query-to>
      <Hsp_hit-from>1544571</Hsp_hit-from>
      <Hsp_hit-to>1544556</Hsp_hit-to>
      <Hsp_query-frame>1</Hsp_query-frame>
      <Hsp_hit-frame>-1</Hsp_hit-frame>
      <Hsp_identity>16</Hsp_identity>
      <Hsp_positive>16</Hsp_positive>
      <Hsp_gaps>0</Hsp_gaps>
      <Hsp_align-len>16</Hsp_align-len>
      <Hsp_qseq>ATTCGATCGGTTACTC</Hsp_qseq>
      <Hsp_hseq>ATTCGATCGGTTACTC</Hsp_hseq>
      <Hsp_midline>||||||||||||||||</Hsp_midline>
    </Hsp>
  </Hit_hsps>
</Hit>
<Hit>
  <Hit_num>2</Hit_num>
  <Hit_id>gi|119500557|ref|XM_001267035.1|</Hit_id>
  <Hit_def>Neosartorya fischeri NRRL 181 conserved hypothetical protei
+n (NFIA_106270) partial mRNA</Hit_def>
  <Hit_accession>XM_001267035</Hit_accession>
  <Hit_len>1188</Hit_len>
  <Hit_hsps>
    <Hsp>
      <Hsp_num>1</Hsp_num>
      <Hsp_bit-score>32.2105</Hsp_bit-score>
      <Hsp_score>16</Hsp_score>
      <Hsp_evalue>21.4857</Hsp_evalue>
      <Hsp_query-from>1</Hsp_query-from>
      <Hsp_query-to>16</Hsp_query-to>
      <Hsp_hit-from>384</Hsp_hit-from>
      <Hsp_hit-to>399</Hsp_hit-to>
      <Hsp_query-frame>1</Hsp_query-frame>
      <Hsp_hit-frame>1</Hsp_hit-frame>
      <Hsp_identity>16</Hsp_identity>
      <Hsp_positive>16</Hsp_positive>
      <Hsp_gaps>0</Hsp_gaps>
      <Hsp_align-len>16</Hsp_align-len>
      <Hsp_qseq>ATTCGATCGGTTACTC</Hsp_qseq>
      <Hsp_hseq>ATTCGATCGGTTACTC</Hsp_hseq>
      <Hsp_midline>||||||||||||||||</Hsp_midline>
    </Hsp>
  </Hit_hsps>
</Hit>
</Iteration_hits>
  <Iteration_stat>
    <Statistics>
      <Statistics_db-num>21147878</Statistics_db-num>
      <Statistics_db-len>2146527478</Statistics_db-len>
      <Statistics_hsp-len>0</Statistics_hsp-len>
      <Statistics_eff-space>0</Statistics_eff-space>
      <Statistics_kappa>0.710602795216363</Statistics_kappa>
      <Statistics_lambda>1.37406312246009</Statistics_lambda>
      <Statistics_entropy>1.30724660390929</Statistics_entropy>
    </Statistics>
  </Iteration_stat>
</Iteration>
</BlastOutput_iterations>
</BlastOutput>

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In reply to Re^4: multiple XML fields in one line by smice
in thread multiple XML fields in one line by smice

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