Exploiting Punctuation Semantics for Querying Continuous Data Streams Pete Tucker and David Maier   View Paper (PDF)   Return to Posters Abstract Applications that process data streams are becoming common. These applications are often queries over streams, so it seems natural to use a database management system instead of a custom application. However, some traditional relational operators are not conducive to stream processing. We propose embedding punctuations into data streams. A punctuation is a predicate that describes a subset of tuples. It informs a stream processor that no tuples exist after that punctuation that satisfy its predicate DiSC'03 © 2003 Association for Computing Machinery