Is an unexpected token. The expected token is
The parser found a character where XML syntax requires a specific one, most often a quote or an equals sign.
The message, as .NET reports it
'2' is an unexpected token. The expected token is '"' or '''. Line 1, position 11.
Why it happens
- An attribute value without quotes (
qty=2): the expected token is a quote. - An attribute without a value (
<input disabled/>): the expected token is=. - A typographic quote (
“) instead of a straight one.
How to fix it
Write every attribute as name="value" with straight quotes.
.NET throws an XmlSchemaValidationException at the first schema error unless XmlReaderSettings.ValidationEventHandler is set, which then receives every one with its line and position. A well-formedness error is an XmlException and ends reading whatever the settings.
The same problem in xmlvalid
xmlvalid validates with libxml2, which reports it as AttValue: " or ' expected. It checks the whole document in your browser and lists every schema error with its line and column, not only the first.
AttValue: " or ' expected
Example
Reports the error
<item qty=2/>
Fixed
<item qty="2"/>