Difference between and in schema definition?

Question

I am using xsd:all in a complex type. When I miss any mandatory elements while validating it will show all the elements. It will not display the exact missed e

Answer 1

Difference:

• xsd:all - "child elements can appear in any order and each child element can occur zero or one time" (ie, maxOccurs can be 0 or 1)
• xsd:sequence - "child elements must appear in a sequence. Each child element can occur from 0 to any number of times" (ie, maxOccurs can be 0 or any number or 'unbounded')

From the W3Schools tutorials here and here.