XML title Regex pattern -

XML title Regex pattern -

this input within article properties alter anything.

input:

<article xmlns:mml="http://www.w3.org/1998/math/mathml" xmlns:oasis="http://www.niso.org/standards/z39-96/ns/oasis-exchange/table" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" article-type="research-article" dtd-version="1.0" xml:lang="en">

output:

<article article-type="research-article" xmlns:mml="http://www.w3.org/1998/math/mathml" xmlns:xlink="http://www.w3.org/1999/xlink" >

i seek regex cant able further.

<article(?: [^>]+)? article-type="research-article"(?: [^>]+)? xmlns:mml="http://www\.w3\.org/1998/math/mathml"(?: [^>]+)?>

you can cut down regex as

<article (xmlns:mml=[^ ]*)\s.*(xmlns:xlink=[^ ]*).*(article-type=[^ ]*).*

the replacement string can <article $3 $1 $2>

which gives output as

<article article-type="research-article" xmlns:mml="http://www.w3.org/1998/math/mathml" xmlns:xlink="http://www.w3.org/1999/xlink">

for illustration see http://regex101.com/r/px1yi6/1

edit

if unsure order in property value may occure, improve utilize separate matches each of properties wish extract

for example

$str =~ m#(xmlns:mml[^ ]*)#; $mml=$1; $str =~ m#(xmlns:xlink[^ ]*)#; $xlink=$1; $str =~ m#(article-type[^ ]*)#; $type=$1; $output = "<article $type $mml $xlink >"; print $output;

will produce output as

<article article-type="research-article" xmlns:mml="http://www.w3.org/1998/math/mathml" xmlns:xlink="http://www.w3.org/1999/xlink" >bash-3.2$ nano xml.pl

xml regex perl