What is the best way to generically categorise data in social media back-end databases within a context of level of openness?
Both academic sources and own thoughts and ideas are appreciated as I have struggled to find any categorisation of the sort.
I didn't come far and my definitions are not crystal clear but here is what I thought:
Open data- information that is open to anyone who requests it. For instance the data that you can access when visiting an url to a Facebook profile without being logged in.
Open data with general limitations- information that is open to a user only if the user meets certain general requirements. For instance the data that you can access when visiting an url to a Facebook profile while being logged in. Also data in open Facebook groups.
Open data with qualified limitations- information that is open to a user only if the user meets specific requirements. For instance the data you can access if you are logged into your Facebook account and the Facebook profile you are visiting is a Facebook friend. Also data in Facebook groups that can be joined after being approved.
Locked data- information that is open only while being logged in as a specific user. For instance that user's chatlogs, data hidden from everyone through privacy settings. Also data in secret Facebook groups.
Internal data- information available only to the provider of the service. For instance every chatlog of every user.
I realise different social media use different standards. I hope this can be a categorisation in general terms.