As part of my contributions to the Drupal Open-Source project, I am working with various methods for metadata mangement in Drupal. I have several modules in development for working with:

• EXIF data
• XMP data
• Watermarking and credits
• Conditional image processing based on metadata
• Working with image metadata as part of the Drupal content management workflow
• Bulk imports of annotated images, eg importing titles and captions when uploading galleries

The import_html.module was developed to assist migrating from old, static file sites (or spidered mirrors) into the Drupal CMS