Assertion: filter's output | /r/HasProperty | standard
Facets:
Source sentences:
text: As is generally the case with command line (i.e., all-text mode) programs in Unix-like operating systems, filters read data from standard input and write to standard output.
text: In Unix and Unix-like operating systems, a filter is a program that gets most of its data from its standard input (the main input stream) and writes its main results to its standard output (the main output stream).