What information is contained inside an Android intent?

• developer.android.com/reference/android/content/Intent § Intent structure — action, data, category, type, component, extras
• developer.android.com/guide/components/intents-filters.html § Building — component name, action, data, category, extras, flags, etc
• tutorialspoint.com/android/android_intents_filters.html — category, extras, flags, component name, etc