LDQL: A Language for Linked Data Queries.
Olaf Hartig · AMW · 2015
In this paper, we propose LDQL, that is, a language to query Linked Data on the Web. The novelty of LDQL is that it enables a user to express separately (i) patterns that describe the expected query result, and (ii) Web navigation paths that select the data sources to be used for computing the result. As a downside of this expressiveness, we find that for some LDQL queries, a complete execution is not possible in practice. To address this issue, we show a syntactic property based on which systems can identify queries that do not have this limitation.