Things

The next step is to get familiar with the DCD Hub, relying on three main concepts:

• A Person represents a physical person, signed up on the hub. It can own, share and have access to Things. A person has:

  • a email address (its unique identifier),

  • a name

  • a password (at least 8 characters)

• A Thing represents a physical or virtual component collecting data. For example, a phone which collects acceleration, a website recording number of page views. A Thing has:

  • an unique identifier (or id), automatically generated by the hub

  • a name

  • a type (optional), to give a type to the Thing (e.g. Phone, Wheelchair, Website)

  • a description (optional)

  • a list of properties (optional) which values change over time

• A Property represents a Thing property

  • an unique identifier (or id), automatically generated by the hub

  • a name

  • a type, which characterise the nature of the property and its number of

    dimensions (See Property Types)

  • a list of dimensions

  • a 2-dimension list of values, starting with a UNIX TIMESTAMP

    and followed by the value of each dimension. All values MUST be numbers.

[
  ["UNIX timestamp", "value-dimension-1", "value-dimension-2"],
  ["UNIX timestamp", "value-dimension-1", "value-dimension-2"]
]

• a list of classes (optional): if the property type is 'CLASS', you can associate

  text to the values. This is useful when using a property as data label.