/* XML Sitemap from Digtal Metro Project [http://nycdigital.org/]

• Kevin Reiss
• kevin.reiss[@]gmail.com
• Builds a valid XML Sitemap to faciliate page crawling.
• Installations adds the sitemap declaration to an Omeka instance's robots.txt file.
• Sitemap Format Information: URL
• Version 0.11
• Tested on Omeka 1.2
• Todo 7.30.2010
• 1. Idenitfy a way to make datestamp of last update for exhibits, collections, categories
• more accurate
• 2. Identify a way to efficiently update sitemap upon addition of new content
• building entire sitemap using the varies "after" hooks that are currently
• commented out.
• 3. Idenitfy a way to schedule sitemap build via daily/weekly chron.
• 4. Identify a way to automatically register sitemap with various
• search engines after the first time it is built.
• 5. Think about who should have permission to see the admin options
• 6. Proper routine to check and see if MetadataBrowser plugin is installed so
• addition of MetadataBrowingCategory categories only happens when the plugin
• confirms it is installed. */