Class for managing requisition documents.

The following operations are supported. For a formal definition, please review the Service Description.

• DeleteDocument
  Deletes a document.
• GetDocumentByDocumentID
  Retrieves a document by its DocumentID.
• GetDocumentByRowID
  Retrieves a document by its RowID.
• GetDocumentsByWhereClause
  Retrieves documents based on a SQL WHERE clause.
• GetFindList
  Retrieves a DataSet with documents for a specific range. Intended for use where incremental paging is required.
• GetFirstDocument
  Retrieves the first document based on DocumentID order.
• GetLastDocument
  Retrieves the last document based on DocumentID order.
• GetNextDocument
  Retrieves the next document based on DocumentID order.
• GetPriorDocument
  Retrieves the prior document based on DocumentID order.
• GetSchema
  Returns an empty dataset.
• Ping
  Checks connectivity with the server.
• SaveDocument
  Saves a document. If a valid RowID is provided, an update is performed, otherwise a new document is created.