i’m looking for a function that counts all "" symbols.

my xml-file looks like:

<files>
<file>
<owner>quatsch</owner> 
<name>beispieldatei2</name> 
<size>1024</size> 
<extension>.doc</extension> 
<creationTime>22.05.2010 16:50</creationTime> 
<lastWriteTime>22.05.2010 16:51</lastWriteTime> 
<lastAccessTime>22.05.2010 16:52</lastAccessTime> 
<path>D:\Dokumente\beispieldatei2.doc</path> 
<parentDirectory>D:\Dokumente</parentDirectory> 
<rootDirectory>D:\</rootDirectory> 
<directory>D:\</directory> 
</file>
</files>

function searched like:

for $q in input()/files
return (count-string($q/file/path, '\')

returnvalue in this example: 2

thanks for any input.

See the following example:

let $string:="1234\56789\1x3\45"
return count
(for $i in 1 to string-length($string)
return substring($string,$i,1) [.="\"])

or

let $string:="1234\56789\1x3\45"
let $matches:=(for $i in 1 to string-length($string) return substring($string,$i,1) [.="\"])
return count ($matches)

or even cleaner

let $string:="1234\567891x3\45"
let $chars:=(for $i in 1 to string-length($string) return substring($string,$i,1))
return count ($chars [.="\"])

Thanks a lot for the reply.

I see, there is quit a better why than mine. In meantime i programmed a function:

declare namespace functx = "...";
declare function functx:index-of-string
( $arg as xs:string? ,
$substring as xs:string )  as xs:integer* {

if (contains($arg, $substring))
then (string-length(substring-before($arg, $substring))+1,
for $other in
functx:index-of-string(substring-after($arg, $substring),
$substring)
return
$other +
string-length(substring-before($arg, $substring)) +
string-length($substring))
else ()
} ;

so I can call the function like:

count(functx:index-of-string($path, '\'))