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TidBITS#111/16-Mar-92
=====================
Aladdin Systems has the hot new program of the week with the
free StuffIt Expander, but Apple may have stolen everyone's
thunder by announcing significant enhancements to the Mac
operating system. We try to explain why you will care, and we
also have some updated information on Macworld Expos around the
world, followed by a review of ProVUE's blindingly fast
database, Panorama II. Read on, Macduff!
Copyright 1990-1992 Adam & Tonya Engst. Non-profit, non-commercial
publications may reprint articles if full credit is given. Other
publications please contact us. We do not guarantee the accuracy
of articles. Publication, product, and company names may be
registered trademarks of their companies. Disk subscriptions and
back issues are available.
For more information send email to info@tidbits.halcyon.com or
ace@tidbits.halcyon.com -- CIS: 72511,306 -- AOL: Adam Engst
TidBITS -- 9301 Avondale Rd. NE Q1096 -- Redmond, WA 98052 USA
--------------------------------------------------------------
Topics:
MailBITS/16-Mar-92
StuffIt Expander
Microkernel Mac
Macworld Modifications
Panorama II Review
Reviews/16-Mar-92
[Archived as /info-mac/digest/tb/tidbits-111.etx; 31K]
MailBITS/16-Mar-92
------------------
Kirke B. Lawton writes, "I just wanted to confirm that Casper
[Apple's voice recognition technology] is based on a large
database of voices. Two years ago I was "abducted" by a market
researcher in a mall to participate in a special project. I was
asked various questions about my geographic background, and then
they had me read oodles of computer "commands" (i.e. "move cursor
blue down") into a microphone. I was told this was for a
Macintosh-related product.
At least I know Casper will recognize my voice!"
Information from:
Kirke B. Lawton -- LAWK@UORVM.BITNET
VIM explanation
Roger D. Parish writes, "I heard a good explanation for the "VIM"
acronym at the SHARE IBM mainframe user's group conference in
Anaheim last week:"
Vendors Ignoring Microsoft :-)
Information from:
Roger D. Parish -- U9505RP@DOEMA.BITNET
StuffIt Expander
----------------
A while back we ran an article about Downline, a utility that does
a wonderful job at decoding Binhex files and StuffIt 1.5.1
archives. Of course, it would be nice if Downline understood
Compact Pro and StuffIt Deluxe as well, since many people use
those formats. I expect that Morpheus Systems is working on adding
these features to Downline, but in the meantime, Aladdin has
released a free program called StuffIt Expander, which should be
especially convenient for System 7 users.
StuffIt Expander weighs in at a mere 57K and should be available
on the major online services now. It works fine with System 6.0.4
or later, but System 7 users can take advantage of the Finder's
drag & drop feature by simply dropping archives on StuffIt
Expander to have them automatically expanded. Aladdin says that
StuffIt Expander is compatible with the 68040, 32-bit addressing,
and virtual memory. Not only that, but it supports AppleEvents (I
have to play with it and Frontier a bit) and has intelligent
background processing. It works well in the background as far as I
can tell. It even works when Nisus is the foreground application,
and Nisus doesn't give much CPU time to background applications.
StuffIt Expander does not know about Binhex files, but it can
expand archives from Compact Pro, StuffIt 1.5.1, StuffIt Deluxe
2.0, StuffIt Deluxe 3.0 (not yet released), along with AppleLink
packages. It cannot expand DiskDoubler combined files or self-
extracting archives of any type, but there's no reason it should.
Anyone who distributes a file compressed with DiskDoubler should
make it a self-extracting archive, and the only reason to use an
expansion program on a self-extracting archive is if the
extracting code is somehow damaged but the archive itself is fine,
an uncommon occurrence.
Using StuffIt Expander is simplicity itself. Under System 7, drop
an archive on the icon and StuffIt Expander automatically expands
the archive. If the archive contains multiple files, the files
will be placed in a folder. The resulting file or folder is always
saved in the same folder as the original archive. If you use
System 6, run StuffIt Expander and select Expand... from the File
menu. You can't miss it; the only other choice is Quit.
Some of you may wonder about the fate of UnStuffIt Deluxe. Aladdin
is continuing to enhance it and will still freely distribute it.
UnStuffIt Deluxe has a larger file size and fancier features than
StuffIt Expander. The next version will support files compressed
with StuffIt SpaceSaver, rejoin segmented files, decode Binhex
files, and come with Aladdin's usually excellent help system. I
believe that UnStuffIt Deluxe will be rather large in comparison
to StuffIt Expander, so people who just want to expand most of the
popular compression formats and nothing else can simply use
StuffIt Expander and not worry about dealing with other programs.
Aladdin Systems -- 408/761-6200 -- aladdin@well.sf.ca.us
ALADDIN on GEnie, AOL, Connect, and AppleLink
Information from:
Aladdin propaganda
StuffIt Expander documentation
Microkernel Mac
---------------
When NeXT or Amiga owners feel the need to disparage the Mac in
conversation, they often mention the fact that Mac doesn't have
"true" multitasking, tacking a little verbal sneer on the tail end
of "true." That generally means that the Mac uses what's called
"cooperative multitasking" instead of "pre-emptive multitasking."
I'm telling you this because Apple announced last week that it
will be remodeling the Macintosh operating system to add pre-
emptive multitasking and other operating system goodies including
multi-threading, memory protection, support for dynamic link
libraries, and some new I/O (input/output) features that will help
peripherals to keep up with the CPU. Why is this good news and not
merely propeller-head tech-speak? Well, let me explain what each
of those goodies will do for you and then you'll see. For those of
you fluent in said tech-speak, I'm aware that I'm over-
simplifying. :-)
More multitasking
Sooner or later, you'll need to figure out the difference between
cooperative and pre-emptive multitasking (it's a great way to
sound technical :-)). Please keep in mind that different people
define this stuff differently. This is a painless-as-possible
mainstream explanation.
In a cooperative system, the foreground application cooperates by
deciding how much CPU time (the amount of time the microprocessor
spends executing useful commands) it wishes to give up to
background applications, whereas in a pre-emptive situation, the
operating system mediates among the priorities of active
applications. For example, on the Mac, Nisus dominates the CPU and
doesn't give other applications much CPU time. Nisus gets to make
that decision and is perfectly within its cooperative multitasking
rights. In a pre-emptive system, every running application has a
priority level, and the operating system parcels out CPU time
based on those priority levels and the number of applications
running.
A difficulty with pre-emptive multitasking is that in an ideal
single-user interactive system, the foreground application is
completely responsive. (If you click the Ignore button in Word 5's
spell checker, you do not want the CPU giving priority to other
programs since it's slow enough already!) In a pre-emptive system
you can often manually set an application's priority level, but
this can be a pain.
That's the advantage of cooperative multitasking - the foreground
application can appropriate an ample amount of CPU time to being
responsive. Windowing systems on fast Unix machines are often less
responsive because the windowing system is merely another
application that gets its share of CPU time, no matter how much
you may use it. On the other hand, in a cooperative multitasking
system, the computer may not work as efficiently because the CPU
spends lots of cycles just spinning its wheels waiting for you to
do something. For example, I'm composing this article in Nisus,
and Navigator was recently downloading in the background. Nisus
took so much CPU time that I had to send Nisus to the background
so that Navigator could finish the download. If Nisus had been
more willing to share CPU time, Navigator could have finished up
during some of the extra CPU cycles. If I were using a Quadra
instead of our SE/30, the CPU would be running even faster and
Nisus would be wasting even more of the CPU's time. Remember, a
CPU cycles many times per second, so if priorities are set right,
pre-emptive multitasking can work out quite well.
In an ideal world, Apple might use a mixed scheduling technique
that would give a lot of CPU time to the foreground application
but would allow the operating system to parcel out CPU time to
each of the background applications according to their priorities.
That would provide fast foreground response while still allowing
multiple background programs to do useful work.
Multi-threading
Multi-threading allows a single application to do multiple things
at the same time. Using multi-threading, a spreadsheet could
simultaneously print a document, recalculate formulas, and accept
data entry. Each task within the application, printing,
calculating, accepting data, acts like a little program in a
cooperative multitasking system, allowing you to keep working
while other parts of the program do other tasks. Both multi-
threading and pre-emptive multitasking will be even more
necessary when Apple releases voice and handwriting recognition
products because the Mac will have to be continually running the
recognition code no matter what else is happening.
Kevlar memory
Memory protection is an extremely useful feature that allows one
program to bomb out of sight without disturbing its neighbors in
memory, although it's still difficult to completely protect the
system heap, since most applications use information in it. That
mean that when you hit a nasty bug, such as the one that causes
Word 5.0 to crash when using the grammar checker on 68000 Macs,
only Word will stop working and all the other programs will
continue working properly. As it is now, your machine restarts on
that bug, which is a big no-no.
Dynamic link libraries
When a programmer compiles a program, the compiler will link in
various standard libraries to perform certain standard functions,
like displaying text on screen. Those libraries are static but
fast because they live in the program. Dynamic link libraries are
a set of routines that applications can use at runtime rather than
include those routines internally. Dynamic link libraries are
slower than static link libraries. Like extensions, you could just
drop some dynamic link libraries into a special folder and various
applications could then use that code, allowing those applications
to be smaller, simpler to write, and more similar to each other,
thus increasing ease of overall use. If implemented correctly,
dynamic link libraries also cut down on memory consumption, since
they only need to exist in RAM once, no matter how many
applications use them. Dynamic link libraries would be especially
useful for companies like Claris and Microsoft, which have
multiple applications with similar interfaces and shared features.
I believe that dynamic link libraries are already available in
Windows, so in this respect Apple is playing catch-up (cleaner
than playing with ketchup).
DMA that SCSI!
The two new I/O enhancements are direct memory access (DMA) and
asynchronous SCSI. DMA has been around for a long time and many
computers support it, including the Atari ST line. In fact, the
Mac IIfx sports DMA in hardware, although it's somewhat useless
since the current MacOS doesn't support it. DMA allows devices
other than the CPU to read and write memory, thus allowing the CPU
to spend more time on other tasks. It's not quite ideal because
the CPU does have to check in occasionally to make sure that the
right stuff is in memory, but it can significantly boost
performance. DMA requires extra hardware as well as operating
system support, so most people will need a new Mac to take
advantage of it. Asynchronous SCSI requires DMA. When supported
though, asynchronous SCSI allows the CPU to delegate a SCSI
command to the SCSI controller and then stop paying attention to
it and go perform other tasks, again increasing performance. For
example, the CPU might tell the SCSI controller to load a sector
from a hard disk into RAM. The controller can start this job while
the CPU does something else.
When will rumor become reality?
We've heard that these features will be available at about the
same time as the PowerPC machines being co-developed with IBM. In
other words, this is all fantasy because by the time the PowerPC
machines come out in late 1993, Apple could completely change its
mind about all this stuff. None of these ideas are new and many
have been around for years in the Unix and mainframe worlds. So
the moral of the story is that Apple, as always, is looking for
ways to make the Mac into a better machine. In this case, Apple is
looking back at standard operating system concepts that it didn't
include the first time around. It's also useful to keep in mind
that this means that Apple is not putting all its eggs under
Taligent's Pink chicken. That's important because in many ways
Apple is a software company and cannot afford to rely on another
company for such key software. Moral or no, I'm still drooling
over this stuff!
Information from:
Pythaeus
Doug Davenport of SNAP Technologies
Related articles:
MacWEEK -- 09-Mar-92, Vol. 6, #10, pg. 1
Macworld Modifications
----------------------
Those of you who try to make it to every MACWORLD Expo possible
have probably noticed that it's becoming harder and harder as
World Expo increases the number of expos around the world. The
increase in number of shows has not been without its growing pains
though. There have been several recent changes worth noting,
though unfortunately the cornerstone Boston and San Francisco
expos have not been rescheduled to fall and spring respectively
(when the weather in each city is nicer).
MACWORLD Canada
North American readers (at least those in the Northeast) will be
pleased to read that MACWORLD Canada will be held for the third
straight year in Toronto, and World Expo has rescheduled the show
back to the autumn season, September 15th through 17th, to be
precise. Apparently the exhibitors liked the fall timing better
and an opening at the Metro Toronto Convention Centre made the
switch possible. Last year's show in Toronto drew over 12,000
people, so although it sounds like enough people to draw the
interesting vendors, it's not quite the 50,000 person crush found
in Boston and San Francisco.
MACWORLD Paris
Jean-Philippe Nicaise, our French correspondent, tells us that
MACWORLD Paris, which was planned for March 31st through April
2nd, was cancelled recently. Apparently the show simply wasn't
popular enough to make it feasible. French enthusiasts will have
to wait until September, when Apple France puts on the Apple Expo,
the only Macintosh-specific expo in France. Luckily there are also
several other expos in Europe for multi-lingual Macintosh
aficionados, including Amsterdam, Berlin, Barcelona, Birmingham,
Helsinki, Milan, Oslo, Stockholm, and the European Summit in
Geneva.
MACWORLD New York
World Expo bought the rights to the Mac Business show that used to
be held in New York in the spring and had scheduled a MACWORLD New
York to take that time slot. Apparently there wasn't enough
interest on the part of the vendors because that show was
cancelled as well. There was also a sense that it was simply one
show too many, that vendors didn't have much interest in another
US show, and small companies found it difficult to keep a show
team on the road. Another problem may be the increasing power of
the niche applications on the Mac. World Expo also bought the
rights to a Mac Business show in Los Angeles in late winter, but
replaced it with Multimedia '92 instead of trying to put on yet
another general show that would compete with San Francisco.
MACWORLD United Kingdom
Unlike New York and Paris, the MACWORLD United Kingdom expo in
Birmingham is still on, although it has been merged with the Which
Computer? Show and will now be held in the National Exhibition
Centre in Birmingham, England from April 7th to 10th (the previous
dates were right about now in March). Given the increasing
tendency to make the shows more specific, as World Expo did with
Multimedia '92, it's a bit surprising that they merged MACWORLD
United Kingdom with a general computer show, although one has to
assume that they felt they would get better exposure via the
merger.
Wherever you may be located, you can get more information on
attending one of the numerous MACWORLD Expos around the world by
sending a note of inquiry to:
MACWORLD Expo
c/o World Expo Corp.
P.O. Box 9107
Framingham, MA 01701 USA
508/875-1573 (fax)
Information from:
Jean-Philippe Nicaise -- nicky@etca.fr
World Expo propaganda
Panorama II Review
------------------
I think it's fair to say that everyone has need of some sort of
database software, even if only for keeping track of names and
addresses. I'll admit that I'm no database guru, although I have
worked with Double Helix a bunch, rescued some data from an old
version of R:Base, and fiddled with various other programs.
For a long time I used HyperCard to do all my database work, but I
was always frustrated by the way my stacks looked and worked, not
to mention the fact that HyperCard is not exactly speedy. I'm sure
much of that was my fault, and I know of ways that I could have
done things better. But I didn't have to because of Panorama II
from ProVUE Development.
Panorama II Introduction
Panorama II is a flat-file database, but it sports a rather
powerful programming language called PanTalk that includes lookup
statements to achieve much of the relational features of the
high-end databases. I'm no expert with FileMaker Pro, but I
believe that the two are fairly comparable in terms of abilities,
although I think that PanTalk is more full-featured than FileMaker
Pro's scripting language. Actually, since you can create multiple
forms in Panorama II that correspond to FileMaker Pro's layouts
and since both databases can run with multiple users over a
network, the main difference I've found is that Panorama II is
blindingly fast in comparison to FileMaker Pro. To be fair, I've
heard people say that FileMaker Pro speeds up significantly if you
put it in a RAM disk, but that's a kludge and may not be possible
on a machine with only a few megabytes of RAM.
Panorama II gets its speed from running directly in RAM, and even
there it is efficient. The program is 600K on disk and prefers
976K of RAM, although it can run with less. ProVUE tells me that
the default memory setting is enough RAM to open a 600K database.
The other advantage Panorama II reaps from running in RAM is that
it doesn't require the indexing structure that most databases use
for fast searching. This shrinks Panorama II files so that they
are only a third to a quarter the size of an equivalent file in
another database.
Of course, the price ProVUE had to pay the RAM devil is that
databases cannot grow beyond the limits of memory, but I think
that's becoming less of an issue these days with cheap RAM and
virtual memory. I'm not going to do benchmarks, but suffice it to
say that with my SE/30 I have yet to notice any delay in finding a
single record in my 1000-record address database, which has quite
a few fields. Access is simply instantaneous. Sorting the database
on a field takes a little longer, but only a few seconds at most.
Every action that I've performed with Panorama II from opening a
database to saving and quitting has been similarly fast with sole
exception of exporting text, which is a bit slower. Obviously
ProVUE doesn't want you exporting out of Panorama II all that
often. :-)
Forms
Panorama II is based on the concept of the form as a window into a
certain set of data, much as FileMaker Pro uses layouts. You can
create multiple layouts and customize them with relatively
sophisticated graphical layout tools, better than are in FileMaker
Pro but not the level of Canvas, for instance. (Picky, aren't I?)
ProVUE has obviously put a lot of time and effort into their
layout tools, and while they are very good on the whole, I'd kill
for movable guides like PageMaker has. Snapping grids and a cursor
with tracer lines to the rulers just don't quite match up. I
wonder if Aldus has a patent on those guides?
It always takes some effort to design a nice screen layout, but
Panorama II helps you out with its internal scrapbook, called the
Flash Art Scrapbook. Once an image is in there, using it only
generates a pointer rather than an image, saving disk space. The
scrapbook can even hold imported EPS graphics. For those of you
who prefer to click buttons and choose things from pop-up menus,
Panorama II does all those things (including checkboxes and radio
buttons) and the buttons especially are trivial to set up. For
those of you with newer Macs or MacRecorders, Panorama II even has
Flash Audio, which lets you include sound in your database.
Data & Design
Things you won't find in FileMaker Pro include the Data Sheet and
the Design Sheet, both of which are holdovers from previous
versions of Panorama and even go back to OverVUE. The Data Sheet
is a spreadsheet-like view of your database with the fields in
columns and the records in rows. It's fast to move around in,
faster than a list view you could create in a form, and has the
added advantage of working much like a spreadsheet, which can be
powerful and confusing. The power becomes apparent when you want
to group the records by a certain field or total a row of numbers.
Then you just click in that field and select the appropriate
command from a menu. New users may find this confusing though,
because some actions take place in the Data Sheet, like sums and
averages, that cannot be done in PanTalk in a form. When you
combine this with the lack of something like Double Helix's inert
fields, which merely display data and don't save anything, it can
be hard to get Panorama II to calculate and display statistics in
a single result form. I get the impression I can do it, but I'm
just not sure how at the moment. Panorama II and PanTalk combine
to create a rich environment and I'm not surprised that it takes a
while to fully understand it.
The Design Sheet also looks like a spreadsheet, but in this case,
each row holds a field definition with each option for that field
in a column. I see why ProVUE stuck with their spreadsheet
metaphor here, but frankly, I think a custom interface to
modifying and creating fields would be easier to use, and in fact,
there is a Field Properties Dialog box (though it doesn't have
options for three of the least used field options). There are 17
options for each field (name, data type, etc.). A few of the
options are especially useful - output pattern for number and date
display, input pattern for social security numbers and the like,
ranges for defining sets of allowable data, choices for defining
specific acceptable values, link for setting links to other
databases, Clairvoyance for reading your mind, dups to prevent or
allow duplication, default values, and equations that will
activate when the field changes.
Clairvoyance
The feature that sets Panorama II apart from all other databases
that I've used is Clairvoyance. Simply put, Clairvoyance quickly
scans the data you've previously entered (in another database
even, if you like) as you're typing and tries to finish off the
entry for you. It waits until it has a good chance of getting the
entry right, but you can always just keep typing. It's a little
disconcerting at first, much like having a small child destroy you
at a video game, but after a while you can't remember how you did
data entry without it (unlike a small child). The added advantage
is that because it always enters an existing value, there is far
less chance for typos and errors to creep in. It's almost worth
buying Panorama II for Clairvoyance alone.
Macros, Formulas, and Crosstabs
As I said, much potential programming can be done directly in the
Data Sheet rather than in a macro. Once you've figured out what
sort of thing is best done where, you can start creating formulas
and macros. Formulas are relatively simple statements using built
in functions to modify data in some way. For instance, I have a
database to keep track of my running, and although it's not
entirely trivial to calculate pace per mile, a formula does that
fine. A formula also strips out the area code from local phone
numbers before dialing, which is in turn controlled by a simple
macro. Macros can do more sophisticated stuff like looking up
values from other databases, and power users can even create menus
in ResEdit and access them through macros, thus creating turnkey
systems. The macro syntax is relatively easy to use, but like most
other languages is extremely picky about the details of field
types and punctuation. For those that don't want to write simple
macros, Panorama provides a Macro Recorder for registering mouse
clicks and menu commands. It's hard to say much more about macros
except that you can probably get them to do what you want with a
little work.
One of the most powerful features in Panorama II is what ProVUE
calls crosstabs. In reality, there's nothing new about crosstabs;
they are merely rows and columns of data like you would see in a
spreadsheet. What's neat about crosstabs though, is that they
aren't in a spreadsheet, so you can use the database features in
Panorama II to enter, sort, categorize, and select the data. That
sort of thing is difficult to do in a spreadsheet, but relatively
easy in a database.
Problems
So it's not perfect. I have two main gripes with Panorama II.
First, the interface is strange, and although sometimes ProVUE has
hit upon a great way of doing something, other times it just falls
flat. Second, although the manual does contain all the information
you will need and is quite well-written, it's organized in an odd
way that makes looking for the specifics of anything rather
tedious. The manual problems may be my personal opinion though,
because as much as I appreciate the descriptions of _how_ to do
something, I often have trouble flipping to the right section. It
looks reasonable in the Table of Contents, but I often have to
poke around in the index to find what I want. There is also a
Picture Index that provides page references to graphical elements
and menu commands in the interface. I haven't been using it but
should give it a try.
The interface is a tougher matter. As I said, parts of it are
great. Whenever you click on a tool in the toolbar to the left of
any window, not only does the icon light up, but a two word
description pops to the right, making it easy to figure out what
each icon does. It's not obtrusive and it works. What doesn't work
is the input box. Whenever you click in a field, you select it,
and copy and paste work fine. The confusion starts when you
double-click on a field, or select it and start to type. A little
box springs up around the field for you to enter and edit data.
The advantage of this is that you can increase the size of the
input box as much as you want, which is handy for large amounts of
data that won't display fully. The problem appears when you want
to go on to the next field. Hitting the tab key will close the
input box as you would expect and move you to the next field.
However, clicking in the next field or in a button will only close
the input box, so you have to click again to select the next field
or button. It sounds minor, but I find it can be a big pain when
doing data entry and unfortunately encourages mouse-less design
since the tab key works so much better. In this respect FileMaker
is much more cleanly implemented, though perhaps not so flexible.
I prefer clean in data entry, and it's especially distressing
since Panorama II does so much to speed and ease data entry.
Panorama II has a few other minor interface quirks, like trying to
get a box around a field and not have that box overwritten when
the input box pops up. Panorama II supports multiple monitors, but
not automatically. You open forms and macros in new windows by
command-selecting an item from a pop-down menu in each window's
title bar, at which point you can draw out on a representative
desktop where you want the window to go. I'd much rather have it
know how to zoom to the current monitor and pick a default size. I
suspect that some of these quirks are left over from previous
versions, and I hope ProVUE is evaluating the utility and design
of them.
Panorama II Conclusions
I'm happy with Panorama II. I primarily use it to keep track of my
addresses and phone numbers because I've never seen an
address/phone DA that I liked entirely. It took a bit more work to
set up in Panorama II, but now I have a database that can dial
phones and print smart envelopes with EPS graphics on them, and a
single click will copy an entire address for use in a letter. The
program is fast and responsive and it took me less time to figure
out than FileMaker Pro. I've been pleased with the limited contact
I've had with ProVUE too, since they independently sent out a free
upgrade which added a few features and supposedly fixed a few
bugs, although I've never had the program crash on me. When it
comes right down to it, I have very little to complain about with
Panorama II, and I fear only that I've been unable to completely
do it justice in this limited space since I haven't even touched
on things like its graphing or outline capabilities. Highly
recommended.
ProVUE Development
15180 Transistor Lane
Huntington Beach, CA 92649
800/966-7878
800/541-5137 (fax)
ProVUE on America Online
Reviews/16-Mar-92
-----------------
* MacWEEK
Fileserver Comparison -- pg. 29
AppleShare 3.0
DataClub 2.0
Atlas Pro -- pg. 29
AutoDoubler -- pg. 30
PowerView -- pg. 36
Shredder -- pg. 36
Nexus fx -- pg. 37
References:
MacWEEK -- 09-Mar-92, Vol. 6, #10
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