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Ch09-Merge
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===============================================
Ch 9 − Mail-Merging with Impression and Ovation
===============================================
Although the title refers to “Mail-Merging” the process to be described is
more accurately termed “Data-Merging” as it is by no means limited to
merging names and addresses into letters or labels; any kind of textual data
from a Powerbase application can be merged into any kind of document in
Impression or Ovation or many other editors and wordprocessors.
9.1 Mail-merging with Ovation
---------------------------------
Ovation expects data for merging to be supplied as a CSV file. An example
file (OvationCSV) is supplied with this version of Powerbase. It was created
from the Elements database and is intended to work with the sample Ovation
document OmergeTest. Before attempting to create CSV files of your own you
are recommended to read the Powerbase documentation on such files (see Ch
8). The process for mail-merging with Ovation is described below.
9.1.1 Preparing an Ovation document for mail-merging
Ovation has a very easy method of specifying where the merged data is to go
into the document. Whenever you reach a point where you wish to insert a
Powerbase field type Ctrl I. A window headed “Merge tag” will appear
inviting you to enter a number. The number required is the field number in
the CSV record (which is not necessarily the field number in the Powerbase
record). If, for instance, you wish to merge the second field from each line
of your CSV file enter 2 and type Return. You will see that “[Merge2]” has
been inserted into the text at the caret. Continue typing, inserting other
fields as required. The fields do not need to be in numerical order (you can
insert field 2 before you insert field 1) and the same field may be inserted
many times. Styles and effects may be applied to the Merge tags. Load
OmergeTest to see how this looks.
9.1.2 Merging the data from Powerbase
With OmergeTest loaded, open the main Ovation menu, go to the File submenu
and choose Print. Select the Mail merge option button and drag OvationCSV to
the writable icon to the right of the button. The pathname of the file will
appear in the icon. Click on OK and the document will be printed once for
each record in the CSV file, merging new data into the document each time.
OvationCSV contains 10 records so if you just want to see the process in
action without actually printing 10 sheets of paper set your printer manager
to print to a file instead of to the printer itself.
If you examine OvationCSV you will see that each field is enclosed in
quotes. This is only necessary of the fields contain literal commas (see
8.1). Look at the first record, for example, and note the comma in
“(Gr.aktis,aktinos; ray or beam)”. Without the quotes Ovation would
interpret the comma as a field separator and the merging would get out of
step for that record.
9.2 Mail-merging with Impression
------------------------------------
The following description applies to Impression Publisher and Impression
Style. The older ImpressionII is also supported. Powerbase and Impression
are able to communicate directly with each other without the need for a CSV
file. This task is performed by a module called ImpulseII which Computer
Concepts have placed in the public domain to encourage its adoption as a
standard means of transferring data between RISC OS applications. The
ImpulseII module is included in the !Powerbase.Resources.Modules directory.
9.2.1 Preparing the Impression document
Since the merged data is not being supplied from a pre-generated CSV file
Impression needs to request specifically each Powerbase field that it wants
to merge into the document. It is probably best to create the document
without worrying about the merged data at first, then insert the necessary
commands afterwards.
Wherever you want data from a Powerbase record to appear in the document
proceed as follows:
(1) Place the caret at the point where the data is to be inserted.
(2) Click MENU over the frame, go to the Utilities submenu (Misc in
ImpressionII) and choose Merge command. A dialogue box will appear.
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(3) Type the following:
:Powerbase GetField NAME
This is on the understanding that your Powerbase record contains a field
whose tag is NAME and that you want the contents of that field inserting
into the Impression document at that point. Note the spaces and the initial
colon. These are essential.
(4) Click on Set or type Return. You will see “<NAME>” appear in the
text.
(5) Repeat for all the other Powerbase fields to be inserted in the
document. All take the form:−
:Powerbase GetField <tag>
and in each case the tag, enclosed in angle brackets, will appear in the
text. All the data in a given document must come from the same database. It
might be easiest if you open the required database and arrange the desktop
so that you can see both the record window and the Impression document.
Clicking MENU over a field makes its tag appear in the second item of the
main Powerbase menu. Copy it exactly into the Merge command window.
(6) Save the the document!
9.2.2 Merging the data
(1) Make sure Impression has been “seen” by the filer then open the
Powerbase database.
(2) Drop the Impression document on the record window. The document
will be loaded and displayed then Powerbase’s Data Merge window will
appear. (If Impression isn’t already running Powerbase will run it
for you.)
(3) Clicking on Merge extracts data from either the first record or, if
the Merge from displayed record switch is set, the
currently-displayed record, and inserts it in the specified places
in the Impression document. You can see this happening if the
relevant parts of the document are visible. Using the keypad to
browse, search or change subfiles or keys now causes the accessed
records to be merged into the document instead of being displayed in
the record window. If a filter (see 2.3.3) is active this will also
be obeyed. Each time a record is merged its data overwrites that
from the previous record.
(4) If your printer is on-line and the printer driver loaded you may
print the document with the merged data by clicking on Print. If
the Print all switch is selected before Merge is clicked Powerbase
will proceed through the database from whichever record you first
merged, merging each record in turn (or each matching record if a
filter is in use) and printing for each record a copy of the
document containing the merged data.
Note that when the mouse pointer is moved over the Impression document with
the merged data present it changes to a large red and blue cross which means
that you cannot edit the document. Clicking SELECT over it has no effect;
the caret doesn’t appear. If you click on Cancel in the Data merge window
the merged data is removed from the document and normal editing is restored.
If you do want to edit the document with merged data present then click on
Edit. Note, however, that if you save the document in this state it will be
saved with the specific data you have merged into it rather than with the
commands to merge data. Appendix A gives a full description of the Impulse
commands or “methods” which Powerbase understands.
9.3 Mail-merging with other programs
----------------------------------------
If you use neither Impression nor Ovation you may still be able to use
mail-merging with your wordprocessor, but you will need to read the manual
carefully to find out how. It will almost certainly involve a CSV, or
similar, file in conjunction with some method of “tagging” the document (as
described above for Impression and Ovation) to specify where in it the data
is to be merged.
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