Final answer:
Knowing the type of data or node in a SPARQL query is important for accurate retrieval and manipulation of information in a dataset.
Step-by-step explanation:
Knowing the type of data or node you are dealing with in a SPARQL query is important because it allows you to accurately retrieve and manipulate information from a dataset.
In SPARQL, data is organized in a graph structure, and nodes represent entities or objects in the graph. Different types of nodes, such as literals or URIs, have specific properties and functions when it comes to querying and filtering data.
For example, if you are querying a RDF graph that represents information about books, knowing that a particular node represents a string literal or a numeric value can help you correctly apply filters or comparisons in your query to retrieve the desired results.