XSD Pattern for containing Quote and Apostophe

Question

How is it possible to create an regular expression within an XSD (pattern) that contains both quotes and apostrophes? I get you can check for one using the other as the value delimiters.

<pattern value="'"/>
<pattern value='"'/>

but what if you need to check for both?

<pattern value=""'"/>
<pattern value=''"'/>

simply dont work

Answer 1

You can use ' or ", for example :

<pattern value="&quot;|'"/>