I agree with devarupa, above, to a great degree. But might add that it is culmination of previous practice. We run into danger if we base our conclusions on just one sutta (including the likes of the satipatthana sutta). The full picture can only be had, if we consider the full gamut of suttas dealing with a particular subject- not easy to do..
Stream entry, part 2 (Study guide)
"The term "stream" in "stream-entry" refers to the point where all eight factors of the noble eightfold path come together.
"Sariputta, 'The stream, the stream': thus it is said. And what, Sariputta, is the stream?"
"This noble eightfold path, lord, is the stream: right view, right resolve, right speech, right action, right livelihood, right effort, right mindfulness, right concentration."
"Very good, Sariputta! Very good! This noble eightfold path — right view, right resolve, right speech, right action, right livelihood, right effort, right mindfulness, right concentration — is the stream."
— SN 55.5"http://www.accesstoinsight.org/lib/study/stream2.html