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lapps / vocabulary-pages

DSL files and templates used to generate the LAPPS WS-EV pages.
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Features vs. Properties #81

Closed reckart closed 5 years ago

reckart commented 5 years ago

The LAPPS WSEV generically defines Properties, e.g. start, end,targets`, etc.

The LIF format makes a distinction between properties and features. Properties are defined directly on the JSON annotation object, while features are actually an embedded map:

{ "@type": "Token", "id": "tok0", "start": 0, "end": 4, "features": { "pos": "NNP" } },

From the WSEV it is not possible to see what is supposed to be a feature and what is supposed to be a property.

marcverhagen commented 5 years ago

Correct, in WSEV you cannot see the difference and conceptually it is all properties and in LIF some properties are expressed on the top-level of an annotations whereas the rest is in the features dictionary which is a dictionary of all other properties. However, it is confusing and I will add something to the LIF specifications on this.

The distinction is there because of historical accident I think and in retrospect we should probably only have had @type and properties as attributes on annotations. Changing this is tricky since it breaks backward compatibility.

marcverhagen commented 5 years ago

Some clarifications were added to the lapps.github.io pages (see https://github.com/lapps/lapps.github.io/commit/3d5e4661bd781e574c7a881f76e7768f55bbb6e6).