How to recursively query with sparql?

@jerad 

To recursively query with SPARQL, you can use a combination of subqueries and common properties between linked resources. Here is an example of how you can construct a recursive query in SPARQL:

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PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?subtree
WHERE {
    ?subtree rdf:type <YourClass>.
    
    {
        SELECT ?parent
        WHERE {
            ?parent rdf:contains ?subtree.
        }
    } UNION {
        SELECT ?parent
        WHERE {
            ?subtree rdf:contains ?child.
        }
    }
}

In this query, replace <YourClass> with the class you are interested in querying. This query will retrieve all resources that are linked to a common parent resource either directly or indirectly through a recursive relationship. You can customize the query based on your specific data model and requirements.