I'm sorry, we're smiling because we collaborate on the national occupational classification. ESDC does a lot of the research and we work with StatsCan to publish it. I may, then, take this question on board.
The skill levels are about the typical education and training required. As to how we assess it, we actually go out and talk to unions and employers and we look at job postings to see what people say they need when they hire. We use that information to determine for these jobs whether they typically—sometimes they do not—require a university degree or would typically require up to two years of a college or apprenticeship training; or would they more likely involve just short-term, on-the-job training?
Really, it's the evidence, the facts of what typical employers who employ those occupations require by way of education and training for entry-level positions.