What characters do I need to escape in XML documents ?

What characters do I need to escape in XML documents ?

Asked on December 14, 2018 in XML.
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  • 3 Answer(s)

    Best answer:

    XML escape characters

         Escaping characters depends on where the special character is used.

    The five characters were:

    1. ”  "
    2. ‘  '
    3. <  &lt;
    4. >  &gt;
    5. &  &amp;

    Text:

         To escape five characters in text, the three characters , and > not be escaped in text.

    <?xml version="1.0"?>
    <valid>"'></valid>
    

    Attributes:

         To escape all five characters in attributes, the > character need not be escaped in attributes.

    <?xml version="1.0"?>
    <valid attribute=">"/>
    

    The character not be escaped in attributes if the quotes are “.

    <?xml version="1.0"?>
    <valid attribute="'"/>
    

    The  not be escaped in attributes if the quotes are ‘ .

    <?xml version="1.0"?>
    <valid attribute='"'/>
    

    Comments:

        All 5 special characters must not be escaped in comments.

    <?xml version="1.0"?>
    <valid>
    <!-- "'<>& -->
    </valid>
    

    CDATA:

        The five special characters should not be escaped in CDATA sections.

    <?xml version="1.0"?>
    <valid>
    <![CDATA["'<>&]]>
    </valid>
    

    Processing instructions:

         The five special characters must not be escaped in XML processing instructions.

    <?xml version="1.0"?>
    <?process <"'&> ?>
    <valid/>
    

    XML vs. HTML:

         The HTML has  set of escape codes that cover a more characters.

    Answered on December 14, 2018.
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    Get this statement:

        In XML, HTML and  SGML documents, logical constructs can be termed as character data and attribute values contains of chain of characters, in which all character can distinct directly or defined by a series of characters known as character reference, that are of two types: a numeric character reference and a character entity reference. The character entity references are valid in HTML and XML documents.

    Five predefined XML entities were:

    1. quot  “
    2. amp   &
    3. apos  ‘
    4. lt         <
    5. gt       >
    Answered on December 14, 2018.
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    Try this key:

    Tags and attributes has various escaping characters.

    For tags:

    1. <    &lt;
    2. >    &gt; (only for compatibility, read below)
    3. &   &amp;

    For attributes:

    1. ”    &quot;
    2. ‘     &apos;

        The & ampersand character  and the left angle bracket should not occur in accurate form, except when used in within a block, a processing instruction, or a CDATA section. It  must escaped numeric character references or the strings ” &amp; ” and ” &lt; ” if they needed. The right angle bracket > can  represents  the string ” &gt; “,and escaped using either ” &gt; ” or a character reference when it displays  in the string ” ]]> ” in content, when that string is not marking the end of a CDATA section.

         Access the attribute values to contain both single and double quotes, the single-quote character  can be defined as ” &apos; “, and the double-quote character as ” &quot; “.

    Answered on December 14, 2018.
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