creating maps in xsl which has the node element name as key and value as key-value

i am trying to create a map in xslt which uses an xml file as input and generates a yaml file

suppose the xml file is as below

<library>
 <location>school</location>
 <books>
  <fiction>
   <author> abc </abc>
   <price>345</price>
  </fiction>
  <general_knowledge>
   <name> axf </name>
  </general_knowledge>
 </books>
</library>

firstly i need to create a map variable then i need to check if node starts with location then write to the map as

location:school

and then later if node starts with fiction

name:abc
price:345

so final map would be

location:school
name:abc
price:345