Fields

At its core eno lets us write down values, the simplest form being:

Current Temperature: Quite pleasant

With this we specify a pair of a key and a value, the key being "Current temperature" and the value being "Quite pleasant".

Some other examples:

Last Name: Schneider
Website: example.com
Profession: Freelance graphics artist

If we don't want to specify a value, we just omit it. (Note for developers: the value then is null, not an empty string)

More information:

Attributes

Instead of a value, a field can also contain attributes. An attribute looks and works almost like a field, except that it is contained within a field and differentiated from it by the operator, an equals sign (=). A key can appear multiple times among the attributes in a field, but applications may choose to accept only unique keys when that behavior fits the usecase better.

color ratings:
green = 3
red = 4
blue = 1

As with fields, the value can be omitted (producing a null value).

image:
src =

Items

As a third alternative, a field can also contain items, which is to say, a list of multiple values.

Shopping list:
- Bread
- Rice
- Tomatos

Items can also have empty (null) values (this can e.g. be used for grouping/spacing usecases):

Sort Order Select:
- Default
- 
- Title
- Year