S-101 Feature Catalogues (contract §104)
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The XML files in this folder are the S-101 ENC Feature Catalogue of editions 1.1.0, 2.0.0 and 2.1.0, published by the
International Hydrographic Organization (IHO).

They are the IHO's, carried unmodified - not part of the plugin's code, and not under its licence
(GPL-3.0-or-later). The IHO's letter to Peau du Monde allows their use. SOURCE.md lists each file with its edition and
its sha256.

The postProcessor reads an S-101 cell by the catalogue of its own edition: the chart draws its features by the S-57
class each feature type names as its alias, and the Attributes names each feature, attribute and value, and
offers what the catalogue binds to it.
