In this section the relationships and usage of main parts are descripted.

• Combinations
• OrderOptions
• Prices
• Prism and cylinder options
• Country groups
• lensGroupNames, optionGroupNames

• Topics for lenses
  • lensRanges
  • lensGeo
  • orderCodeVariants
  • equalPropertyVariants
  • colors
  • sorting
  • lensMaterialProperties

• miscellaneous

• Further important changes