How to make an element in XML schema optional

Question

So I got this XML schema    lt  xml version  1 0   gt   lt xs schema version  1 0             xmlns xs  http   www w3 org 2001 XMLSchema             elementFormDefault  qualified  gt       lt xs element name  request  gt           lt xs complexType gt               lt xs sequence gt                   lt xs element name  amenity  gt                       lt xs complexType gt                           lt xs sequence gt                               lt xs element name  description  type  xs string    gt                           lt  xs sequence gt                       lt  xs complexType gt                   lt  xs element gt               lt  xs sequence gt           lt  xs complexType gt       lt  xs element gt   lt  xs schema gt    How do I make the description element optional  So both XML with the description element and without will validate against the XSD

User · Answer

Set the minOccurs attribute to 0 in the schema like so    lt  xml version  1 0   gt     lt xs schema version  1 0  xmlns xs  http   www w3 org 2001 XMLSchema  elementFormDefault  qualified  gt       lt xs element name  request  gt           lt xs complexType gt               lt xs sequence gt                   lt xs element name  amenity  gt                       lt xs complexType gt                           lt xs sequence gt                               lt xs element name  description  type  xs string  minOccurs  0    gt                           lt  xs sequence gt                       lt  xs complexType gt                   lt  xs element gt               lt  xs sequence gt           lt  xs complexType gt       lt  xs element gt   lt  xs schema gt

User · Answer

Try this   lt xs element name  description  type  xs string  minOccurs  0  maxOccurs  1    gt    if you want 0 or 1  description  elements  Or   lt xs element name  description  type  xs string  minOccurs  0  maxOccurs  unbounded    gt    if you want 0 to infinity number of  description  elements

[xml] How to make an element in XML schema optional?

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