ERROR NewNodeNodeFactory Broken XML file for node description of org.de.NewNodeNodeFactory: The reference to entity "O" must end with the ';' delimiter.

<?xml version="1.0" encoding="UTF-8"?>
<knimeNode icon="./default.png" type="Other" xmlns="http://knime.org/node/v2.8" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://knime.org/node/v2.10 http://knime.org/node/v2.10.xsd">
<name>NewNode</name>

<shortDescription>
    some short description
</shortDescription>

<fullDescription>
    <intro>
        some Description
    </intro>


    <option name="Path to Excel: ">Set the absolute path to the Excel-file.</option>
    <!-- possibly more options that can also be grouped by tabs -->
    <!--
    <tab name="Standard Options">
        <option name="short name of first option (like in the dialog)">description of first option</option>
        <option name="short name of second option (like in the dialog)">description of second option</option>
    </tab>
    <tab name="Advanced Options">
        <option name="short name of first advanced option (like in the dialog)">description of first advanced option</option>
    </tab>
    -->
</fullDescription>

<ports>
    <!-- possibly more input ports here-->
    <outPort index="0" name="KV-Tableset Output">A KV-Tableset (see documentation for more information)</outPort>
    <!-- possibly more output ports here-->
</ports>
<views>
    <!--view index="1" name="name of second view">Description of second view...</view-->
</views>