Data Types
Data types describe a space of possible values through the specification of constraints
What are data types?
Data types describe a space of possible valid values. For instance, the string value foo might be an instance of a Text data type, or a float value of 0.6 might be an instance of a Number data type.
Data types describe their possible values by specifying constraints. For an instance of a value to be valid, it must satisfy the constraints expressed on the associated data type.
Data types consist of the following:
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a requiredurl, which is a globally unique identifier, where the data type’s definition can be accessed (in most cases this will be a URL)→
a requiredname, which should generally be a non-pluralized short description of the data type (for example: “Number” not “Numbers”)→
optionally adescriptionto further explain the semantic meaning of the data type→
a required definition of its possible value
Top-level data types in HASH
The Block Protocol specifies a set of primitive top-level data types, which we use in HASH.
These can be considered the least restrictive value spaces:
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Text→
Number→
Boolean→
Null→
Object
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