This document discusses principles for open government data and provides examples of how parliamentary proceedings in the Netherlands have been published according to these principles. It outlines principles from the W3C and Open Government Group for making data human and machine-readable, linked, standardized, and reusable. Recent parliamentary data from 1995 onward is available online, while older historical proceedings from 1814-1995 can also be accessed. The document encourages assessing existing parliamentary websites against these principles and fully implementing open data standards to maximize the value and novel insights that can be gained from the data.