Thank you Gabor! This help alot but I was not able to get what I wanted.
Here is the plugin.xml code:
------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin>
<!-- This is an example for providing an own category -->
<extension
point="org.knime.workbench.repository.categories">
<category
description="Category containing my nodes"
icon="icons/default.png"
level-id="myNodes"
name="My nodes"
path="/"/>
</extension>
<extension
point="org.knime.workbench.repository.nodes">
<node
factory-class="org.optum.knime.readfasta.ReadFastNodeFactory"
id="org.optum.knime.readfasta.ReadFastNodeFactory"/>
</extension>
</plugin>
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Using the above code, the try to create a new category call "My nodes" but it was not created.
Instead, the node appear in the root directory.
Also, if I wanted to put a custom icon, do you know where I can place the .png file within the knime folder structure.
Thanks,
Ky