Q. What is the primary motivation for using query rewriting techniques in the context of OBDA?

View solution

Q. What benefits can be achieved through load-time precomputation of inferences in OBDA systems?

View solution

Q. What role does the form of the SQL query play in achieving high performance in the context of query rewriting into SQL?

View solution

Q. Which system served as a platform for the implementation of epistemic-query answering techniques in the context of Description Logic (DL) ontologies?

View solution

Q. Which prototype implemented resolution-based query rewriting techniques?

View solution

Q. Which system focused on the exploitation of efficient rewriting techniques, SQO optimization, and the generation of efficient SQL queries?

View solution

Q. What was the primary focus of QuOnto and Mastro initially?

View solution

Q. Which generation of OBDA systems has focused on efficient rewriting techniques, SQO optimization, and efficient SQL query generation?

View solution

Q. What is a challenge in optimizing query rewriting techniques for industrial applications and Big Data?

View solution

Q. What has been the focus of optimization in the context of OBDA systems so far?

View solution

Q. In the context of Big Data and complex analytical queries, what is considered a viable alternative for achieving good performance?

View solution

Q. What should an OBDA system provide when domain-specific procedures are more efficient?

View solution

Q. What should an optimal system for query answering in the context of Big Data include?

View solution

Q. In the context of OBDA solutions for industrial applications involving time-stamped data, what is one of the requirements for the user query language?

View solution

Q. What is a challenge when using SQL to represent validity of facts with attributes Start and End?

View solution

Q. What is the challenge when only irregular time points are stored for measurements?

View solution

Q. What attribute might refer to the insertion time (transaction time) of a tuple in a time-stamped data scenario?

View solution

Q. What is a potential issue when querying for data in a Big Data scenario with mobile sensors?

View solution

Q. What is the primary distinction between abstract temporal databases and concrete temporal databases?

View solution

Q. What is the difference between valid time and transaction time in the context of temporal databases?

View solution