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What does nillable mean in schema? How to specify it in instance document?

April 26, 2017DOCUMENT instance mean schema specify

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What does nillable mean in schema? How to specify it in instance document?

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In database systems, we use NULL to represent the value of an attribute that is unknown or not applicable. In XML Schema, we can use nillable attribute to indicate that whether the element’s content could be nil, as in If the content of an element is nil, we can use xsi:nil attribute to signal the processor, as in and this element must not contain any content.