etc
Please use tagsBasePath, and namespaces for different paths
<article jcr:primaryType="cq:Widget"
fieldLabel="Article Type"
name="./cq:tags"
tagsBasePath="/etc/tags/namespace"
xtype="tags">
<namespaces jcr:primaryType="cq:WidgetCollection">
<ns1 jcr:primaryType="nt:unstructured" maximum="1" name="article-type" />
</namespaces>
</article>
ref: cq5 - How to filter tags in a component dialog. Adobe CQ - Stack Overflow