XML 2 ports

<?xml version="1.0"?>
<block>
    <name>Noise Calc</name>
    <key>noise_calc</key>
    <category>PCTC</category>
    <import>import noise_calc</import>
    <make>noise_calc.noise_calc()</make>
    <sink>
        <name>in</name>
        <type>float</type>
    </sink>
    <source>
        <name>noise_lev</name>
        <type>float</type>
    </source>
    <source>
        <name>deviation</name>
        <type>float</type>
    </source>
</block>