Hi Ronnie
You can download some sample DITA content from here https://github.com/DITAWriter/pilot_training_mitchell_bomber written by a great chap called Keith Schengili-Roberts.
This will allow you to try editing DITA content using AEM Guides and publishing using the default Output Presets.
Structured authoring has been around since the 1960s and was developed to help organisations handle large, complex documentation.
Key concepts are:
Information typed content (e.g. concept, reference, task)
Bite sized topics i.e. one theme per topic
Content re-use (with content re-use global changes are easy and translation costs can be vastly reduced)
Separating content from its formatting so authors focus on what to write rather than how it appears
Multi-channel publishing (publishing the same content to different output formats e.g. PDF, HTML, AEM Sites, webhelp, JSON, etc)
Linking
Conditions (allows you to include/exclude content)
Keys (allows authors to change their content quickly and easily depending on content e.g. product, region, audience, any context you want)
AEM Guides supports all of the concepts above. I don't know AEM Sites well enough to comment versus Guides, but if you have large, complex documentations, then AEM Guides will allow you to create and manage that content and publish to AEM Sites and many other formats.
Regards
Keith
