Use a character reference to represent it: &amp; See the specification:. The ampersand character (&) and the left angle bracket (<) MUST NOT appear in their literal form, except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.

Jul 7, 2009 · Perhaps this will help: List of XML and HTML character entity references:. In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a ...

This makes sense - the XML library is preventing you from disrupting the syntax used for the parent xml.etree.cElementTree.Element or any child xml.etree.cElementTree.SubElement object fields. For example, use the code block in this great answer to experiment:

Feb 13, 2014 · In this page, Microsoft says that XML reserved characters (and their entity) are the following ones: > &gt; < &lt; & &amp; % &#37; But in this other page, I found that also ' is a reserved character (and its entity is &apos;). Can someone indicate me some official reference in which are listed all and only the XML reserved characters?

Feb 11, 2009 · Looks fine there but the XML ends up being invalid. Looking at the file in Visual Studio Code, the em-dash was rendered as an invalid character (was diamond with question mark in it). So re-copied the text into Visual Studio Code and re-saved and the file retained the valid em-dash character.

Oct 19, 2011 · There are two ways to represent characters which have special meaning in XML (such as < and >) in an XML document. CDATA sections; As entities; A CDATA section can only be used in places where you could have a text node. <foo><![CDATA[Here is some data including < and > (and &!) ]]></foo>

Apr 7, 2014 · Yes, that's right - SecurityElement.Escape(string s) will escape your string and make it XML safe. This is important, since if we are copying or writing data to Infopath Text fields, it needs to be first Escaped to non-Entity character like "&amp;" .

Jun 23, 2013 · XML processors SHOULD match character encoding names in a case-insensitive way and SHOULD either interpret an IANA-registered name as the encoding registered at IANA for that name or treat it as unknown (processors are, of course, not required to support all IANA-registered encodings)."

Jul 14, 2009 · The following class definition gives a simple method to convert an input XML string into formatted output XML with the xml declaration as UTF-8. It supports all the configuration options that the XmlWriterSettings class offers.

Sep 2, 2011 · Update:. From Extensible Markup Language (XML) 1.0 (Fifth Edition):. 2.4 Character Data and Markup. The ampersand character (&) and the left angle bracket (<) must not appear in their literal form, except when used as markup delimiters, or within a comment, a processing instruction, or a CDATA section.