The node type nt:file represents a file. It requires a single child node, called jcr:content. This node type represents images and other binary content in a JCRWiki entry. The node type of jcr:conent is nt:resource which represents the actual content of a file.

Find node with the primary type is 'nt:file' and which whose 'jcr:content' child node contains "cats".

Normally, we can't find nodes (in our case) using just JCR SQL or XPath queries. But we can configure indexing so that nt:file aggregates jcr:content child node.

So, change indexing-configuration.xml:

<?xml version="1.0"?>

<!DOCTYPE configuration SYSTEM "http://www.exoplatform.org/dtd/indexing-configuration-1.2.dtd">

<configuration xmlns:jcr="http://www.jcp.org/jcr/1.0"

               xmlns:nt="http://www.jcp.org/jcr/nt/1.0">

    <aggregate primaryType="nt:file">

        <include>jcr:content</include>

        <include>jcr:content/*</include>

        <include-property>jcr:content/jcr:lastModified</include-property>

    </aggregate>

</configuration>

Now the content of 'nt:file' and 'jcr:content' ('nt:resource') nodes are concatenated in a single Lucene document. Then, we can make a fulltext search query by content of 'nt:file'; this search includes the content of child 'jcr:content' node.