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Article:
  Inside iPhoto: Image Management for Power Shooters
Subject:   metadata is
Date:   2002-01-31 06:27:18
From:   earlyjones
Response to: Metadate & file structure

metadata is "data about data". in the general context of image databases it usually refers to any textual data that describes the image file in any way. this can be broken down in to descriptive metadata, administrative metadata, and structural metadata. descriptive metadata describes what the content of the image is of and about. administrative might tell when the image file was created. structural metadata might describe the actual structure of the file format (a tiff file has a text header containing tags followed by binary image data, and so on). as you can imagine, there are many ways to go about this.