What effect does the attribute noNamespaceSchemaLocation have on XML parsing?

[dedoncito]

By definition:\[quote\] The noNamespaceSchemaLocation attribute references an XML Schema document that does not have a target namespace.\[/quote\]How will this attribute ever alter the result of parsing? For example, take this XML:\[code\]<?xml version="1.0"?><name xmlns="http://www.example.com/name" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.example.com/name schema/schema.xsd" title="Mr."> <first>John</first> <middle>M</middle> <last>Doe</last></name>\[/code\]referring to this schema:\[code\]<?xml version="1.0"?><schema xmlns="http://www.w3.org/2001/XMLSchema"xmlns:target="http://www.example.com/name"targetNamespace="http://www.example.com/name" elementFormDefault="qualified"> <element name="name"> <complexType> <sequence> <element name="first" type="string"/> <element name="middle" type="string"/> <element name="last" type="string"/> </sequence> <attribute name="title" type="string"/> </complexType> </element></schema>\[/code\]I removed these namespace declarations from the schema:\[code\]xmlns:target="http://www.example.com/name" targetNamespace="http://www.example.com/name" \[/code\]without even using the noNamespaceSchemaLocation attribute in the referencing XML, no error was thrown. Why do we even need this attribute in the first place?