[edit] data structure

This originates from the last edits in !18 (merged)

The term data structure was created as a sub-class of structured data.

ToDo:

• discuss: do we need this class?
• There are several classes (i.e. JSON-Schema that could be moved as instances to structured data)
• The class is not well annotated (synonyms, contributors, DE) and should be completed (or made obsolete).

current proposition:

note: When we talk about data structures we can mean two very different things! E.g. when we point at a variable in computer code and say "That's a list." then we talk about both, the variable being an individual list data structure and the general data structure category of lists.

side note: the following is the result of this thought process

- specification (def: see HDO)
  - data structure specification (def: a specification which pertains to the structuredness of some data.)
    - list specification (def: a specification which requires a portion of data to consist of, at the top-level/primarily, an opening element, possibly multiple contained elements in sequence, and a closing element in this order.)
    - dictionary specification (def: ...)
    - object specifiction (def: ...)
    - ...
...
- structural quality (def: see HDO)
  - structured (def: see HDO)
    - list structured (def: a structured quality(?) which inheres in data by virtue of that data being
      structured as specified in a list specification.)
    - dictionary structured
    - object structured
    - ...
...
- structured data (def: see HDO)
  - list (def: structured data which has the quality list structured.)
  - dictionary
  - object
  - ...

As you can see, we don't have the term "data structure" itself, because it does not fit with the rest of HDO. In order to help people who are doing a Ctrl+F on "data structure" we can add it as a related synonym to structured data.