This document describes the changes from version 1 to version 2 of this API.
For general information about migrating your client from version 1 to version 2, see the Data APIs migration guide.
Version 2 of the API uses ETags to indicate when an entry has changed. For more information, read the ETags section of the Google Data API documentation, and read the Update and Delete sections of the Picasa Web Albums Data API Protocol developer's guide.
Canonical album titles no longer appear in any feeds or URLs. To refer to a resource, use the album ID instead.
The following elements are no longer used in feeds:
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<gphoto:client><gphoto:name><gphoto:position><gphoto:version>Documentation has been added for the following elements, which can appear as part of photo entries returned in search feed results:
The way visibility is handled has changed. For more information, see Visibility values in the reference guide.
All elements that were formerly declared as inner classes of com.google.gdata.data.photos.impl.Extensions have been moved under the main data path, to com.google.gdata.data.photos.
The affected elements are:
GphotoAlbumIdGphotoCommentCountGphotoCommentsEnabledGphotoConstructGphotoNicknameGphotoPhotoIdGphotoThumbnailGphotoTimestampGphotoUsernameGphotoVersionSeveral new image sizes have been added for the imgmax and thumbsize parameters. The former limit for embeddable image sizes has been raised from 800px to 1600px. This means that effectively all available sizes can now be embedded on webpages. For more info see the updated reference section here.