how can i get attribute values from xml using libxml

Hi ,
i have xml document like this
<?xml version="1.0" encoding="ISO-8859-9"?>
<Root><Stk Category="601" Group="60101"
Brand="001">....................

then i have to use Category attribute but reader class couldnt
recognize attributes

when i use these codes below for testing;

    while reader.read

    puts reader.node_type
    end

it shows only 1 and 15 values which means
XML_READER_TYPE_ELEMENT => 1
XML_READER_TYPE_END_ELEMENT => 15

how can i get attribute values?

i tried another method
doc = reader.expand
doc.find('//Root/Stk/[Category='601']')
but it also didnt work

try doc.find('//Root/Stk[@Category="601"]')

Thanks a lot Simon , it worked ,
can we double this filter method like category="601" and brand="15" at
the same time

See in-line code additions

Quoting lecielbleu <canali83@gmail.com>:

Hi ,
i have xml document like this
<?xml version="1.0" encoding="ISO-8859-9"?>
<Root><Stk Category="601" Group="60101"
Brand="001">....................

then i have to use Category attribute but reader class couldnt
recognize attributes

when i use these codes below for testing;

    while reader.read

                case reader.node_type
                when XML_READER_TYPE_ELEMENT
                    case reader.name
                    when 'Stk'
          puts reader['Category']
          puts reader['Group']
                    end
                end

try researching xpaths, particularly how to or 2 xpaths together.