Now, "doctype pdf" – DOCTYPE is related to HTML, the declaration at the beginning of a webpage. A PDF is a document format. Maybe the user is confused because they're looking for a PDF document that contains information on "catch and cradle" in weightlifting, but they mentioned DOCTYPE, which is a web term. Alternatively, they might want to know how to create a PDF document with that content using a DOCTYPE declaration in HTML, which is a bit off.