Split the content of a variable (xpath 1.0)

Hi all,

I have a variable "Keywords" with several keywords inside.
They are seperated with ;.
so i want per xslt to split this content into single keywords,
like this:

<keywordset>
  <keyword>Keyword1</keyword>
  <keyword>Keyword2</keyword>
  <keyword>Keyword3</keyword>
  <keyword>Keyword4</keyword>
  <keyword>Keyword5</keyword>
</keywordset>

xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<wordDocument>
        <DocumentProperties>
                <Title>Titel</Title>
                <Subject>Subtitel</Subject>
                <Author>AutorVorname AutorNachname</Author>
                <Keywords>Keyword1; Keyword2; Keyword3; Keyword4; Keyword5;
Keyword6</Keywords>             
        </DocumentProperties>
</wordDocument>


In the string functions (xpath 1.0) i can´t find an adequate function!?
have someone an idea?

Thanks,
Silvia



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