up vote 1 down vote favorite

This is my sample file:

<?xml version="1.0" encoding="UTF-8" ?>
 <testjar>
 <testable>
  <trigger>Trigger1</trigger>
  <message->2012-06-14T00:03.54</message>
 <sales-info>
  <san-a>no</san-a>
  <san-b>no</san-b>
  <san-c>no</san-c>
  </sales-info>
  </testable>
  </testjar>

I need to extract xml tags from this-

e.g. output of above file should be 

testjar
testable
trigger
message
sales-info
....
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2 Answers

up vote 3 down vote accepted 
$> cat ./text
<?xml version="1.0" encoding="UTF-8" ?>
 <testjar>
 <testable>
  <trigger>Trigger1</trigger>
  <message>2012-06-14T00:03.54</message>
 <sales-info>
  <san-a>no</san-a>
  <san-b>no</san-b>
  <san-c>no</san-c>
  </sales-info>
  </testable>
  </testjar>

And

$> grep -P -o "(?<=\<)[^>?/]*(?=\>)" ./text
testjar
testable
trigger
message
sales-info
san-a
san-b
san-c

Regular expression (?<=\<)[^>?/]*(?=\>) consist of 3 parts:

  • (?<=\<): (?<=) is lookbehind operator, so it means "after <";

  • [^>?/]*: not >,?,/ 0 or more times;

  • (?=\>): (?=) is lookahead operator, so it means "before >"

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Can you explain what does '>' on the start of the command? I.e. $> cat . Пожалуйста. And why you use ./ which means an execution, afaik. – caligula Jul 25 '12 at 8:39
$> is my bash PS1. It indicates that following line is shell query. ./ means "current directory" ⇒ ./text ≡ text. – ДМИТРИЙ МАЛИКОВ Jul 25 '12 at 9:07
working fine for me. thanks :) – Pravin Satav Jul 25 '12 at 9:12
Thanks, understood – caligula Jul 25 '12 at 9:16
I have checked if file comes in single line also, it works perfectly fine – Pravin Satav Jul 25 '12 at 9:18
up vote 0 down vote 
awk -F">" '{print $1}' xmlfile | sed -e '/<\//d' -e '/<?/d' -e 's/<//g'
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If file comes in single line then its not providing any output. – Pravin Satav Jul 25 '12 at 9:17

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