“Open means anyone can freely access, use, modify, and share for any purpose – subject, at most, to requirements that preserve provenance and openness”

                                                                                                       Open Knowledge Foundation

Data are Open if everyone can use, modify, share and freely access them; there are only few limitations that concern the protection of sensitive information and the availability of data.

Open Data should be released following two main aspects:

Legally open if:

• Published with a creative commons license
• Conditions to reuse

Technically open if:

• machine-readable
• non-proprietary