How to ignore values in sparql?

@dana 

To ignore certain values in SPARQL, you can use the FILTER clause to exclude these values from your query results. Below are some examples of how to ignore values in SPARQL:

1. Using the FILTER clause with the NOT IN operator:

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SELECT ?s ?p ?o
WHERE {
   ?s ?p ?o
   FILTER (?o NOT IN (value1, value2, value3))
}

1. Using the FILTER clause with the != operator:

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SELECT ?s ?p ?o
WHERE {
   ?s ?p ?o
   FILTER (?o != value1 && ?o != value2 && ?o != value3)
}

1. Using the FILTER clause with a regular expression to ignore specific values:

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SELECT ?s ?p ?o
WHERE {
   ?s ?p ?o
   FILTER (!regex(?o, "pattern1") && !regex(?o, "pattern2"))
}

By using the FILTER clause in SPARQL queries, you can specify conditions to exclude certain values and focus on the desired results.