Sitecore Gyan : Day 22

For case insensitive operation with Sitecore XPath Query, use CompareCaseInsensitive function.
For example:
/sitecore/content//*[CompareCaseInsensitive(@@keyname,'valueincasesensitive')]
And all XPath Query function defined in Sitcore.Data.Query.Functions

Sitecore Gyan : Day 21

Federated Experience Manager (FXM) allows us to track visitor interactions and generate analytics info on external,
non-Sitecore websites with Sitecore.
To enable FXM functionality, a JavaScript tag is added to the external websites.
FXM Experience Editor allows us to do task same as on Sitecore XP.
For FXM,

• must be supportable license.xml
• must have Sitecore xDB
• must be same application level protocol for both external and sitecore.

FXM is use to implement 

• personalization rules
• create goals and events 
• implement content profiling on an external website.

for config Sitecore.FXM.*.config at ~/App_Config/Include/FXM