Welcome to the S-100 Geospatial Information Registry (Version 2.1)
This registry is owned by the International Hydrographic Organization (IHO) is managed by the Secretariat of the IHO. The site contains many registers of hydrographic information together with registers of supplementary information owned by specialist domain experts. Each register type is further sub-divided into domains e.g. hydrographic, nautical publications, ice, inland ENC etc. The administration of this registry conforms to IHO Publication S-99 (Operational Procedures for the Organization and Management of the S-100 Geospatial Information Registry) a copy of which can be downloaded here.
The information contained in the Registry can be freely accessed, however items can only be added or changed by the managers of approved Submitting Organizations. Application to become a Submitting Organization can be made by fulfilling the requirements of the prerequisite form available here. Please note: It is not necessary to be a submitting organization in order to request new (S-62) Data Producer codes. Requests for new Data Producer codes, or changes to existing codes should be sent to the following email address (adcs@iho.int).
Once accepted as a submitting organization you are free to submit proposals to any register. The Registry interface undergoes periodic improvements and any difficulties using this site should be reported to the Registry Manager.

Feature Concept Dictionary Register according to S-100
No. Type Valid Superseded Retired
1 Feature Type 333 308 288
2 Information Type 20 1 0
3 Simple Attribute Type 573 279 158
4 Enumerated Type 3387 751 325
5 Complex Attribute Type 85 66 40
6 Code List Type 9 1 11
7 Code List Value Type 84 2 99
Portrayal Register
No. Type Valid Superseded Retired
1 Symbol 582 0 0
2 Line Style 55 0 0
3 Area Fill 26 0 0
4 Font 4 0 0