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Helper classes

Some helper classes are provided in order to pass data between the application and database access functions, i.e. for passing parameters and return values:

  • String - support for string objects (C++ only)
  • StringList - support for string lists (C++ only)
  • TypedString - supports strings passing data for complex data types
  • Key - special TypedString for passing key values
  • Instance - special type string for passing instance values
  • OSIString - special type string for passing OSI expressions and operation/access paths
    • Option - application settings in hierarchical option variables
    • Global variables - usage of thread global variables
      • Binary - support for binary data access
    • Time - support for time objects
  • Date - support for date objects
  • DateTime -- support for timestamp objects

String and StringList are passed to .NET applications as string and string array objects, which can be handled easily in .NET languages.

Subtopics

  1. Application options
  2. Global variables
  3. Binary data block handle
  4. String value
  5. String list
  6. Instance and key value
  7. Key value
  8. Instance string
  9. OSI expression string
  10. Time value
  11. Date value
  12. Timestamp
  13. Parser for files or strings with defined BNF syntax
  14. BNF tree node
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