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I am using boost ptree to parse xml 

read_xml(stream, pt, trim_whitespace | no_comments);



<?xml version="1.0" encoding="windows-1252"?>
<rss>  
<channel>.....</channel> 
</rss>

How to read the version and encoding of the xml : I tried the following 

std::string encoding =  pt.get<std::string>("<xmlattr>.encoding", "");

which gives empty string. How to get the version and encoding of xml?

Chris Schmich
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Hummingbird
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1 Answers1

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The processing instruction is not an XML element (in fact, it's... a processing instruction).

Processing instructions do not have attributes in the <xmlattr> sense. You will note that there is no ptree node corresponding to it.

Here's an undocumented way to achieve what you likely want: Add xml-stylesheet processing instructions to boost property_tree

Community
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sehe
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  • Thanks @sehe, but i think xml_writer_setting always return **utf-8** as encoding [boost xml witer](http://www.boost.org/doc/libs/master/boost/property_tree/detail/xml_parser_writer_settings.hpp), doesn't it? – Hummingbird May 13 '16 at 01:32
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    Basically, what you're discovering is that Boost doesn't have an XML library. – sehe May 13 '16 at 01:35