6-owce.adoc

GeoPackage OWS Context Extension

Warning

This subsection is under discussion and may change radically.

Extension Title

OWS Context

Introduction

This extension provides a mechanism for storing OWS Context content in a GeoPackage using the standard ATOM or GeoJSON encoding.

Extension Author

Image Matters LLC, in collaboration with the participants of the OGC Vector Tiles Pilot and the OWS Context SWG.

Extension Name or Template

im_ows_context (will become gpkg_ows_context if adopted by OGC)

Extension Type

New requirement dependent on GeoPackage Core (Clause 1).

Applicability

This extension adds an additional level of organization to existing GeoPackage data.

Scope

read-write

Specification

gpkg_extensions

To use this extension, add the following row to this table.

Table 1. gpkg_extensions Table Rows

table_name	column_name	extension_name	definition	scope
gpkgext_contexts	null	im_ows_context	a reference to this file	read-write

Note	The values in the definition column SHOULD refer in some human-readable way to this extension specification. If the extension is adopted by OGC, it will gain the "gpkg_" prefix and get a different definition permalink.

gpkgext_contexts

This table describes OWS Context instances. The columns of this table are:

• id is a primary key

• name is a text label for the context

• format is the format of the context (e.g., atom or geojson)

• context is the actual context text

• title is an optional text title designed to be human-readable

• description is an optional text description designed to be human-readable