Blueprints deal more with the templating and data sources of your site. More or less, the bones of the site.

Pages are the actual html pages. A link to a page can appear in the navigation or it can be standalone (404 error, maintenance.) Sections are the admin interface screen for a page.

Page structure (html) is defined by a Master xsl template.

Utilities are pieces of reusable code. Which you can use in any Page and Masters template.

Assets are CSS or JS that is related to your site.

Controllers This is where you find all of your data sources and events. A datasource is what grabs the information from your database and then converts it into usable XML for Symphony to make use of. These are a key part of any Symphony site and are very powerful.

Events perform a certain function when an event is triggered, such as sending an e-mail from the e-mail form or posting a comment.