After you have created the VMD file, the next step is to create the Python scripts for it. To do this:

• From the Chameleon menu, select Global Outbound Preprocess Script. In the window that appears, type the following script, which initializes the OBX segment counter:

OBXSetID = 0

• Click Ok to close this window and save this script.
• In the Workspace, double-click the OBX segment.
• In the first row of the OBX segment window - the row whose Name column is Set ID - Obx - locate the Outbound Script column, and click ... (ellipsis). This enables you to create an Outbound Script for this field.
• In the window that appears, type or copy the following script:

try:
   OBXSetID
   OBXSetID += 1
except NameError:
   OBXSetID = 1

value = str(OBXSetID)

• Click Ok to close this window and save this script. This code uses the OBX segment counter to set the ID number for each OBX segment in the generated message.
• In the second row of the OBX segment window - the row whose Name column is Value Type - locate the Outbound Script column, and click ... (ellipsis) to create an Outbound Script for this field.
• In the window that appears, type or copy the following script:

value = 'TX'
ValueType = value

• Click Ok to close this window and save this script.
• In the third row of the OBX segment window - the row whose Name column is Observation Identifier - locate the Outbound Script column, and click ... (ellipsis) to create an Outbound Script for this field.
• In the window that appears, type or copy the following script:

ObservationIdentifier = value

• Click Ok to close this window and save this script.
• In the fifth row of the OBX segment window - the row whose Name column is Observation Value - locate the Outbound Script column, and click ... (ellipsis) to create an Outbound Script for this field.
• In the window that appears, type or copy the following script:

ObservationValue = value
value = ' ' # this will create an OBX segment with empty string in OBX-5

• Click Ok to close this window and save this script.
• In the 11th row of the OBX segment window - the row whose Name column is Observation Result - locate the Outbound Script column, and click ... (ellipsis) to create an Outbound Script for this field.
• In the window that appears, type or copy the following script:

value = 'F'
ObservationResultStatus = value

• Click Ok to close this window and save this script.
• From the Chameleon menu, select Global Outbound Post Process Script. In the window that appears, type or copy the following script:

OBX5sList = [] # create empty Python list


# build a new OBX segment, as it shows in customer sample message
def another_OBX(nextObservationLine):
   global OBXSetID # Hint: we have to update a variable defined outside of function

   OBXSetID += 1
   return 'OBX|' + str(OBXSetID)               \
                 + '|'                         \
                 + ValueType                   \
                 + '|'                         \
                 + ObservationIdentifier       \
                 + 2 * '|'                     \
                 + nextObservationLine         \
                 + 6 * '|'                     \
                 + ObservationResultStatus + '\r'


# split customer Report content into lines and append lines to Python list
def split_report(ObservationValue):
   global OBX5sList 

   while ObservationValue.count('\\R\\') > 0: # Hint: each tilde is escaped by Chameleon

      try:
         ObservationValue.index('\\R\\')
         position = ObservationValue.index('\\R\\')
         OBX5sList.append( ObservationValue[:position] )
         ObservationValue = ObservationValue[(position + 3):] # Hint: \R\ takes exactly 3 characters

      except ValueError:
         pass

   OBX5sList.append(ObservationValue)
   return 


# process the Report content
if len(ObservationValue) > 0 and ObservationValue != ' ':

   # split Report content into list of lines
   split_report(ObservationValue)

   # iterate on entire list of Report lines, and concatenate new OBX segments to message
   for nextObservationLine in OBX5sList:
      value = value + another_OBX(nextObservationLine)

• Click Ok to close this window and save this script. This script does most of the work: it splits the incoming observation value text into individual sentences or sentence fragments and creates an OBX segment for each.
• Save the VMD file and close it.

Your VMD file is now complete. The next step is to create the channel in Iguana and generate the messages.

	Here is a sample copy of the VMD file: repeating_obx.vmd.