Is curled quote valid xml for attribute value-CodePudding

For example is the following line a valid xml

<?xml version=“1.0” encoding=“UTF-8” ?>

It would be very helpful if somebody also able to provide reference for this.

CodePudding user response：

As for the reference, the XML specification is at https://www.w3.org/TR/REC-xml/ and the relevant rule is

[10]    AttValue       ::=      
           '"' ([^<&"] | Reference)* '"'
        |  "'" ([^<&'] | Reference)* "'"

CodePudding user response：

Short answer: No. Valid double quotes are hex 0x22 (plain ascii) while your example provided hex 0x201c.

A proper XML editor should provide the right ones.

Historically, support for curved quotes was a problem in information technology, primarily because the widely used ASCII character set did not include a representation for them.

Curved quotes within and across applications