Where does XSLT fit in?

XSLT

is a transformation language

XSLT

different from HTML (markup language), CSS (styling language), JS (programming language) and SQL (query language)

XML <-> XML

XML <-> HTML

XML <-> TEXT

XSLT in the real world

XPath

Nodes: Elements, attributes, siblings, ancestors, children, descendents?

/Element
@attribute
parent/..
../child(ren)