A CDE Definition
(1) (EXtensible Metadata Platform) An ISO standard for storing and exchanging descriptive data (meta-data) about some object. Initially developed by Adobe, XMP data can be embedded into various media formats, including images and PDF files, or it can reside in separate files. In a post-production workflow, the XMP data can be updated as the content passes from one step to the next. See metadata.
(2) (X/Open Management Protocol) A high-level network management protocol governed by X/Open. Network management software written to the XMP interface is shielded from the details of the underlying SNMP or CMIP protocols.
(1) (The Metadata Company, LLC, Long Beach, CA, www.metadata.com). Formerly Metadata Information Partners, Metadata is a software firm offering a variety of data management products and services. In 1986, the U.S. Patent and Trademark Office granted the company incontestable status for the Metadata trademark. Whenever the term is used generically in this encyclopedia (definition #2 below), it is spelled with a dash (meta-data).
(2) (meta-data) Data that describes other data. For example, data dictionaries and repositories provide information about the data elements in a database (see data dictionary). Digital cameras store meta-data in the image files that include the date the photo was taken along with camera settings (see EXIF). Digital music files contain meta-data such as song title and artist name (see ID3 tag). Meta-data are stored in an HTML page (Web page) to help search engines define the page properly, and most especially, make it rank higher in the results list (see meta tag).
Meta-data has existed for centuries. Card catalogs and handwritten indexes are examples long before the electronic age. See Meta Data Coalition.
The Most Glaring Lack of Meta-Data
The music CD should have been designed with meta-data, such as album name, artist and song titles. With 650 million bytes of storage, a few thousand could have easily been reserved for future use. In the early 1980s, readouts to display this information were expensive, and the future was not considered. The result was a circuitous route of searching by track length for the missing data on the Internet when a CD was played on the computer (see CDDB), as well as conflicts in older stand-alone CD players when meta-data was finally added to the format.
Meta-Data in the Snowden Debacle
After former CIA employee Edward Snowden leaked top-secret American surveillance programs to the press in May 2013, meta-data came front and center. It was revealed that the U.S. National Security Agency (NSA) had undertaken massive phone surveillance, and the controversy was about what was recorded: the actual voice conversations or only the meta-data (times and telephone numbers of the calls). Even when voice content is not recorded, the meta-data can be analyzed to determine who might be in contact with suspected terrorists.
Meta-Data in an Image File
A Ton More
Before/After Your Search Term
|XML schema library||XMT|
|XML schema repository||XN bit|
|XML tag set||Xnix|
Terms By Topic
Click any of the following categories for a list of fundamental terms.