Merge pull request #12 from gadomski/issues/8-get-ambiguity

Add clarification around GET w/o include

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Clarified behavior of GET requests when `include` is missing ([#12](https://github.com/stac-api-extensions/fields/pull/12))
+
 ## [v1.0.0-rc.3] - 2022-03-29
 
 ### Changed
@@ -33,6 +39,7 @@ None
 Versions [v1.0.0-rc.1](https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.1) and
 prior can be found in the [stac-api-spec](https://github.com/radiantearth/stac-api-spec/) repo
 
+[Unreleased]: <https://github.com/stac-api-extensions/fields/compare/v1.0.0-rc.3...main>
 [v1.0.0-rc.3]: <https://github.com/stac-api-extensions/fields/tree/v1.0.0-rc.3>
 [v1.0.0-rc.2]: <https://github.com/stac-api-extensions/fields/tree/v1.0.0-rc.2>
 [v1.0.0-rc.1]: <https://github.com/radiantearth/stac-api-spec/tree/v1.0.0-rc.1>

README.md

@@ -89,11 +89,12 @@ name, e.g., `properties.datetime` or `datetime`.
 2. If only `include` is specified, these fields should be the only fields included.
    Any additional fields provided beyond those in the `include` list should be kept
    to a minimum, as the caller has explicitly stated they do not need them.
-3. If only `exclude` is specified, the specified fields should not be
-   included, but every other field available for the
-   Item should be included.
-4. If `exclude` is specified and `include` is null or an empty
-   array, then the `exclude` fields should be excluded from the default set.
+3. For POST requests, if only `exclude` is specified, the specified fields
+   should not be included, but every other field available for the Item should be
+   included.
+4. For POST requests, if `exclude` is specified and `include` is null or an
+   empty array, then the `exclude` fields should be excluded from the default set.
+   This also applies to GET requests when only `exclude` fields are specified.
 5. For nested fields (e.g., `properties.datetime`), the most specific path
    should be honored first, and `include` should be preferred over `exclude`. For
    example: