<!-- ##### SECTION Title ##### -->Simple XML Subset Parser<!-- ##### SECTION Short_Description ##### -->parses a subset of XML.<!-- ##### SECTION Long_Description ##### --><para>The "GMarkup" parser is intended to parse a simple markup formatthat's a subset of XML. This is a small, efficient, easy-to-useparser. It should not be used if you expect to interoperate with other applications generating full-scale XML. However, it's very useful forapplication data files, config files, etc. where you know yourapplication will be the only one writing the file. Full-scale XMLparsers should be able to parse the subset used by GMarkup, so you caneasily migrate to full-scale XML at a later time if the need arises.</para><para>GMarkup is not guaranteed to signal an error on all invalid XML; theparser may accept documents that an XML parser would not. However, XML documents which are not well-formed<footnote id="wellformed">Being wellformedis a weaker condition than being valid. See the <ulink url="http://www.w3.org/TR/REC-xml/">XML specification</ulink> for definitions of these terms.</footnote> are not considered valid GMarkup documents. </para><para>Simplifications to XML include:<itemizedlist><listitem><para>Only UTF-8 encoding is allowed.</para></listitem><listitem><para>No user-defined entities.</para></listitem><listitem><para>Processing instructions, comments and the doctype declaration are "passed through" but are not interpreted in any way.</para></listitem><listitem><para>No DTD or validation.</para></listitem></itemizedlist></para><para>The markup format does support:<itemizedlist><listitem><para>Elements</para></listitem><listitem><para>Attributes</para></listitem><listitem><para>5 standard entities: <literal>&amp;amp; &amp;lt; &amp;gt; &amp;quot; &amp;apos;</literal></para></listitem><listitem><para>Character references</para></listitem><listitem><para>Sections marked as CDATA</para></listitem></itemizedlist></para><!-- ##### SECTION See_Also ##### --><para></para><!-- ##### SECTION Stability_Level ##### --><!-- ##### ENUM GMarkupError ##### --><para>Error codes returned by markup parsing.</para>@G_MARKUP_ERROR_BAD_UTF8: text being parsed was not valid UTF-8@G_MARKUP_ERROR_EMPTY: document contained nothing, or only whitespace@G_MARKUP_ERROR_PARSE: document was ill-formed@G_MARKUP_ERROR_UNKNOWN_ELEMENT: error should be set by #GMarkupParser functions; element wasn't known@G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE: error should be set by #GMarkupParser functions; attribute wasn't known@G_MARKUP_ERROR_INVALID_CONTENT: error should be set by #GMarkupParser functions; something was wrong with contents of the document, e.g. invalid attribute value<!-- ##### MACRO G_MARKUP_ERROR ##### --><para>Error domain for markup parsing. Errors in this domain willbe from the #GMarkupError enumeration. See #GError for information on error domains.</para><!-- ##### ENUM GMarkupParseFlags ##### --><para>Flags that affect the behaviour of the parser. </para>@G_MARKUP_DO_NOT_USE_THIS_UNSUPPORTED_FLAG: flag you should not use.@G_MARKUP_TREAT_CDATA_AS_TEXT: When this flag is set, CDATA marked  sections are not passed literally to the @passthrough function of  the parser. Instead, the content of the section (without the   <literal>&lt;![CDATA[</literal> and <literal>]]&gt;</literal>) is  passed to the @text function. This flag was added in GLib 2.12.<!-- ##### STRUCT GMarkupParseContext ##### --><para>A parse context is used to parse a stream of bytes that you expect tocontain marked-up text. See g_markup_parse_context_new(),#GMarkupParser, and so on for more details.</para><!-- ##### STRUCT GMarkupParser ##### --><para>Any of the fields in #GMarkupParser can be %NULL, in which case theywill be ignored. Except for the @error function, any of thesecallbacks can set an error; in particular the%G_MARKUP_ERROR_UNKNOWN_ELEMENT, %G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,and %G_MARKUP_ERROR_INVALID_CONTENT errors are intended to be set from these callbacks. If you set an error from a callback,g_markup_parse_context_parse() will report that error back to its caller.</para>@start_element: Callback to invoke when the opening tag of an element    is seen.@end_element: Callback to invoke when the closing tag of an element is seen.    Note that this is also called for empty tags like     <literal>&lt;empty/&gt;</literal>.@text: Callback to invoke when some text is seen (text is always    inside an element). Note that the text of an element may be spread    over multiple calls of this function. If the %G_MARKUP_TREAT_CDATA_AS_TEXT    flag is set, this function is also called for the content of CDATA marked     sections.@passthrough: Callback to invoke for comments, processing instructions     and doctype declarations; if you're re-writing the parsed document,     write the passthrough text back out in the same position. If the    %G_MARKUP_TREAT_CDATA_AS_TEXT flag is not set, this function is also     called for CDATA marked sections.@error: Callback to invoke when an error occurs.<!-- ##### FUNCTION g_markup_escape_text ##### --><para></para>@text: @length: @Returns: <!-- ##### FUNCTION g_markup_printf_escaped ##### --><para></para>@format: @Varargs: @Returns: <!-- ##### FUNCTION g_markup_vprintf_escaped ##### --><para></para>@format: @args: @Returns: <!-- ##### FUNCTION g_markup_parse_context_end_parse ##### --><para></para>@context: @error: @Returns: <!-- ##### FUNCTION g_markup_parse_context_free ##### --><para></para>@context: <!-- ##### FUNCTION g_markup_parse_context_get_position ##### --><para></para>@context: @line_number: @char_number: <!-- ##### FUNCTION g_markup_parse_context_get_element ##### --><para></para>@context: @Returns: <!-- ##### FUNCTION g_markup_parse_context_new ##### --><para></para>@parser: @flags: @user_data: @user_data_dnotify: @Returns: <!-- ##### FUNCTION g_markup_parse_context_parse ##### --><para></para>@context: @text: @text_len: @error: @Returns: