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There may also be "metadata databases" where one database contains metadata for several source files. In most cases the relationship between the source file and the sidecar file is based on the file name; sidecar files have the same base name as the source file, but with a different extension.
On January 5, 2009, Google released a beta version of Picasa for Mac (Intel-based Macs only). [16] Also, a plugin is available for iPhoto to upload to the Picasa Web Albums hosting service. There is also a standalone Picasa Web Albums uploading tools for OS X 10.4 or later. [17] The Picasa for Mac is a Google Labs release.
ExifTool implements its own open metadata format. It is designed to encapsulate metainformation from many sources, in binary or textual form, and bundle it together with any type of file. It can either be a single file, wrapping existing data, or used as a sidecar file, carrying for example Exif or XMP metadata.
The most common metadata tags recorded in XMP data are those from the Dublin Core Metadata Initiative, which include things like title, description, creator, and so on. The standard is designed to be extensible, allowing users to add their own custom types of metadata into the XMP data. XMP generally does not allow binary data types to be embedded.
The photo's metadata included GPS coordinates locating McAfee in Guatemala, and he was captured two days later. [25] McAfee later claimed to have edited the Exif data from his phone to provide a false location. [26] According to documents leaked by Edward Snowden, the NSA is targeting Exif information under the XKeyscore program. [27]
In Apple's Mac System 7, released in 1991, users could assign one of seven editable colored labels (with editable names such as "Essential", "Hot", and "In Progress") to each file and folder. [26] In later iterations of the Mac operating system ever since OS X 10.9 was released in 2013, users could assign multiple arbitrary tags as extended ...
The news feed is the primary system through which users are exposed to content posted on the network. Using a secret method (initially known as EdgeRank), Facebook selects a handful of updates to actually show users every time they visit their feed, out of an average of 1500 updates they can potentially receive.
Facebook's data policy outlines its policies for collecting, storing, and sharing user's data. [119] Facebook enables users to control access to individual posts and their profile [120] through privacy settings. [121] The user's name and profile picture (if applicable) are public.