Here is a brief description of namespaces and tags in Fluidinfo that the system uses to manage itself. You will probably find some of them useful too.
There is a user called fluiddb with a top-level namespace called fluiddb. This user is just like any other user, though with permission to act on any namespace or tag.
The about tag has a path of fluiddb/about. To find an object with a given about value, you can do a Fluidinfo query on this tag. For example, fluiddb/about = "http://www.nytimes.com".
There is a tag called fluiddb/users/username whose values contain Fluidinfo usernames. This tag can be found on each object corresponding to a user. So to find the object for a given user, you can send a query such as fluiddb/users/username = "david".
Note that in order for this query to work, you must test against the user name in lower case. That’s because usernames in Fluidinfo are case insensitive and are converted to lower case for storage.
There is also a tag called fluiddb/users/name which holds the name of the user in real life. This tag may not be present on all user objects, or may be empty. But if a Fluidinfo user has provided their name, this is where you can find it (i.e., this tag will be on the object corresponding to the user, and its value will be the user’s name).
The tag fluiddb/namespaces/path can be found on objects that correspond to Fluidinfo namespaces. Its value is the full path name of the namespace. So to find the object corresponding to a namespace george/books, you could do a query fluiddb/namespaces/path = "george/books".
Similarly, the tag fluiddb/namespaces/description can also be found on objects that correspond to namespaces. Its value is the description of the namespace (often given when the namespace is created).
Just as with namespaces, there are two tags that hold information about other tags. These tags are named fluiddb/tags/path and fluiddb/tags/description, and they function in a manner analogous to the tags for namespaces.
There are also permissions tags corresponding to all the actions that can be attempted on namespaces and tags. A full description of these can be found here. Please note that it is not necessary to read that page in order to understand Fluidinfo and its permissions system. Neither is it necessary to read the full description in order to use the Fluidinfo REST API. The description is there for people who want to fully understand the Fluidinfo permissions system.
