EEA
EIONET Development Tools and
Philosophy
ITTAG Meeting Athens
20th September, 2000
Søren Roug
EEA
Agenda
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What is Open Source?
EIONET’s Software Tools
PHP
Why Linux
What is Zope
Zope Products
What is Zope’s Role?
Zope in EIONET Context
• Creating a new
announcement
• XML: alternative formats
• XML example: NATLAN2
• Zope demonstration
Open Source: Why Use It?
• Code reuse
– Software created for one DEM could be used
for another if we have the source
• Competition
– To make it possible for other companies to
make extensions to CIRCLE (or provide 3rd
level support)
• Protection of investment
– In the event that the software vendor goes out of
business or loses interest in the product
EEA
EIONET's Open Source Initiative
EEA
• EIONET wants to use Open Source products as
much as possible
• ED, TietoEnator and others write software
products for us
– Hence, from now on; the new products, we ask them
to develop, are Open Source
• We have chosen Mozilla Public License
– What does that mean?
MPL: Contracting Company’s Rights
EEA
• You may sell (for profit) EIONET-owned software
to others or EIONET (e.g. bundled with service)
– But you must tell the customer, that the source is
available for free (Sec 3.6)
• You may combine it with proprietary software as a
larger works
– But if you modify the EIONET-owned software you
must make it available for free in source form
Some Business As Usual
• We will still ask a company to do QA testing
and product support
• Will we have different incompatible versions
of CIRCA?
– No, CIRCA is not (yet) Open Source and if it
was, the Mozilla License will prevent it. That’s
why we chose MPL
• *Much* more emphasis on design
documentation
EEA
EIONETS Software Tools
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Philosophy: Open Source
Webserver: Apache
Content Management: Zope
Rapid development: PHP
Operating Systems: Linux, Commercial UNIX
Groupware system: CIRCA
Data formats: XML
Database system: MySQL
EEA
PHP
EEA
• PHP is a language to make HTML-documents more
interactive
• You program directly in the HTML document
• EEA use it for the THEMES database and
WASTEBASE
• PHP is also Open Source software
Why Linux
EEA
• Linux is as stable as commercial UNIXes
• Our biggest Solaris Server is 2 x 480 MHz CPUs
– Our next Linux will be Intel-based 1.100 MHz
– Much cheaper
• You can install a development system on an old PC
EEA
LINUX in a Wrist Watch
• 8 MB RAM
• 8 MB Flash RAM
• X-windows
• Weigth: 44 Grams
LINUX on Handhelds
Left: Compaq iPaq /206 MHz
Right: YOPY /206 MHz
EEA
Linux Elsewhere
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EEA
IBM Mainframes
www.google.com has 5000 Linux PCs in a cluster
SUN Sparc processors
Compaq Alpha processors
Turnkey systems
– Fileservers/Intranet servers
– Firewalls
Why Use Zope?
EEA
• We want livelier content on the webservers
• We want access to small databases
• We want a framework, where we can build small
applications
• Support for XML
• Audience: What else do we want?
What Is ZOPE?
EEA
"Zope is the leading Open Source application
server, specializing in interactive content such as
portals and content management systems"
Everything is through-the-web
Built-in programming language
Integrated object database
XML, WebDAV, XML-RPC, SQL, LDAP
What Can We Do With Zope?
EEA
• Zope comes in building blocks called "products"
– A building block provides a feature such as a guest
book or announcements or workflow
• There are more than 200 products right now
– It's just install and play
Zope Products
SiteSummary - retrieve announcements from
another webserver in RSS format
Yihaw - Tree structure directory like in Yahoo! But
extended with FAQs, announcements
MeetingManagement - Lets you collect
registrations for small meetings
Zwiki - A permanent whiteboard for a webserver
SquishDot - a bulletin board
... and hundreds more
EEA
Zope’s Role
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Rapid content creation!
Integrator of services
Can be used with little experience
Can be extended with special modules - the products
• PHP
– Rapid application development
– Good for prototyping
– Needs programming experience
EEA
Zope’s Role
• Java Servlets
– Very flexible and low-level
– Needs professional programmers
– Impossible to customise for webmaster
• CIRCLE
– Specialised for group work
– Difficult to customize
– Impossible to extend
EEA
EEA
Zope in EIONET Context
LDAP
Directory
MYSQL
CIRCA
Other
Zope
HTTP
XML-RPC
Zope
Creating a New Announcement
EEA
Title
Expires
Article
The result is a
record, which we
can then display
as HTML or
XML
EEA
XML: Alternative Formats
• Now as we have structured many types of data we
can reuse them in many formats
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RSS for inclusion on other webservers
WML for display on WAP-phones
It is an ongoing process, and it requires a further
abandonment of HTML for storage
XML
HTML
Format
ting
SGML
Convert
PDF
WML
EEA
XML Example: NATLAN 2
Database
Coordinates
in XML
NATLAN
Engine
Database
Web browser
Augmented
map
Zope Demonstration
• Now We switch to a live demonstration of Zope
EEA
Descargar

Zope for Content Managers