Wrong documentation on hover

[HandOfGod94]

Following issues needs to be addressed regarding documentation:

• Since documentation is searched with selectSingleNode it will display wrong documentation if the tag remains same.
• namespace specific documentation. If elements belongs to different namespace, it should search documentation based on the namespace. Currently, it searches all the xsds files specified in schemaLocation.

Steps to reproduce:

• Open any of the complex pom.xml, such as this projects itself, in any editor supporting LSP, preferably VSCode.
• Hover over artifactId in dependency and parent pom itself, both displays same documentation.

[HandOfGod94]

The implementation is now completely different than what was described earlier. Still the bug remains, because of the nature of XML.
Some XSD authors wants documentation to be alongside the xs:element itself, while some defines the elementType and then writes documentation in the type definition. There could be more than 1 ways to write documentation. What we need is a robust mechanism (if exists) to get correct documentation for an XSD.
Intellij is somehow pulling it off, so it should be doable.