Definisi Metadata adalah data yg menjelaskan data, atau singkatnya data template, yang memiliki tujuan untuk standarisasi. Contoh sederhana: definisi untuk data tanggal. Cara penulisan tanggal bermacam-macam : 21 Nov 2008, 21/11/08, 21/11/2008, dll. Supaya standard, penulisan tanggal harus mengikuti metadata dd/mm/yyyy.
Penjelasan lebih lengkap tentang metadata bisa dilihat pada http://en.wikipedia.org/wiki/Metadata : Metadata (meta data, or sometimes metainformation) is "data about data", of any sort in any media. An item of metadata may describe an individual datum, or content item, or a collection of data including multiple content items and hierarchical levels, for example a database schema. In data processing, metadata is definitional data that provides information about or documentation of other data managed within an application or environment.
For example, metadata would document data about data elements or attributes, (name, size, data type, etc) and data about records or data structures (length, fields, columns, etc) and data about data (where it is located, how it is associated, ownership, etc.). Metadata may include descriptive information about the context, quality and condition, or characteristics of the data.
For example, metadata would document data about data elements or attributes, (name, size, data type, etc) and data about records or data structures (length, fields, columns, etc) and data about data (where it is located, how it is associated, ownership, etc.). Metadata may include descriptive information about the context, quality and condition, or characteristics of the data.
Sedangkan Metadata Services merupakan sebuah system (database/repository) untuk menyimpan definisi metadata. Tujuannya adalah untuk reusability (supaya dapat digunakan berulang-ulang). Contoh aplikasi untuk metadata services: Microsoft Metadata Services SDK.http://www.microsoft.com/downloads/details.aspx?FamilyID=81C641E6-38DD-4C28-A123-7B984300E2F0&displaylang=en
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