About

Dataset page states:

NYC.gov features a raw data catalog with machine readable data (such as XLS, XML, CSV, and RSS). Click the following link to search Raw Data Sets.

Access

Datasets are listed in two main sections:

• raw data
• geographic data

Openness

Appears to be open - but not explicitly published with an open license or legal tool. Terms of Use state that anyone who provides "software applications" based on the datasets must notify the city, reproduce appropriate disclaimers.