Saxon » SaxonJS

The code for the adaptive serialization method (Serialize.js line 1887) is doing

w.write('"' + applyCharMap(item.toString().replace(/"/, '""')) + '"');

The spec says: *An instance of xs:string, xs:untypedAtomic or xs:anyURI is serialized by enclosing the value in double quotation marks and doubling any quotes within the value; or optionally by enclosing the value in apostrophes and doubling any apostrophes within the value. *

The code is incorrect because replace() only replaces the first instance. If we fix it to do a global replace, we get a correct answer of six double-quotation marks (equally unreadable, but correct). But a smarter solution is to use single quotes as the delimiter if the string contains double quotes.

The use case in question is actually displaying a string that contains JSON. This is probably not uncommon. Since JSON is likely to contain double-quotes, it's worth the effort to use single-quotes as the delimiter in this case.

Added QT3 test case Serialization-adaptive-85