Info Path Form in SharePoint 2010

SharePoint can collect data using lists or InfoPath from Libraries.
InfoPath is better suited for these tasks:
1. Data validation
2. Conditional Formatting
3. Submitting to database
4. Submitting via email
5. Collecting signatures
6. Read-only views of data
7. Links to remote data source such as SQL or Access Database
InfoPath's form-creation tools are based on XML and its related standards.
When you save an InfoPath form to form library, SharePoint saves the form data as an XML file in the library.
InfoPath is both designer and form viewer.

Form Library :

A Form library is basically a document library that uses an InfoPath form template as a template rather than a word, Excel, or PowerPoint file.

It is wholly XML centric. The form design is based on XML schema.
InfoPath views are based on XSL transformation(XSLT).
All InfoPath data is saved as XML.
In the InfoPath, the form template is new format with an .xsn extension.
Types of InfoPath form:
1. Blank
2. Web service: with this option, the wizard will prompt you to enter url of a web service that has implemented SOAP 2.0- compliant WSDL.
3. Database
4. XML or Schema : InfoPath lets you design a form against existing XML document or schema.
Data types available in InfoPath:
1. Text
2. Whole Number
3. Decimal
4. True/False
5. Hyperlink
6. Date
7. Time