Supported features:

• go to definition for variables and <sp:include> tag uri attributes
• hover for documentation of
  • most tags
  • most attributes
  • attribute enum values
  • global functions in spel attribute values
• diagnostics on:
  • syntax errors
  • misplaced, unclosed and deprecated tags
  • duplicate, required and deprecated attributes / tag-bodies
  • nonexistent files in <sp:include> and similar tags
  • sitepark expression language (spel):
    • syntax errors
    • nonexistent global functions
    • incorrect argument counts for global functions
• completion for:
  • tags
  • </, closing the last unclosed tag
  • attributes
  • attribute values that either:
    • have a fixed set of possible values
    • point to another spml file
    • refer to an spml module
• semantic highlighting for attribute values that expect:
  • conditions
  • expressions
  • identifiers
  • objects
  • regular expressions
  • text
  • uris
  • to be comparable (for <sp:if> and <sp:elseif> eq/gt/...)
• code actions to:
  • generate a default file header
  • fix small spel syntax errors (quickfix)
  • fix all quickfix-able errors at once (source.fixAll)
  • split <sp:if> condition into name and eq/gt/isNull/...
  • join <sp:if> name and eq/gt/isNull/... into condition

1. Install the extension
2. Change File association for *.spml files to spml

For the path completion of the uri attribute of sp:include, a mapping from module ID to file system path must be defined in the settings.

Open the Settings and go to the SPML section and declare a module-mapping.