Free uml statechart software for linux

UMLet project is an open-source Java tool for rapidly drawing UML diagrams with a pop-up-free, light-weight user interface.
UMLet lets you draw diagram sketches fast; export diagrams to eps, pdf, jpg, svg, and sys.
Add elements to a diagram with a double click. Edit elements using the lower-right text panel. Select multiple elements using Ctrl or lasso. Press C to copy diagram to the system clipboard
Main features:
- fast
- text-based sequence diagram
- call from command line.

UML::Sequence is a Perl module to render UML sequence diagrams, often by running the code.

SYNOPSIS

use UML::Sequence;

my $tree = UML::Sequence->new(@methods, @outline, &parse_method);
print $tree->build_xml_sequence(Title);

To use this package, or see how to use it, see genericseq.pl and seq2svg.pl.
This class helps produce UML sequence diagrams. build_xml_sequence returns a string (suitable for printing to a file) which the seq2svg.pl script converts into svg.

To control the appearance of the sequence diagram, pass to the constructor:
1 a reference to an array containing the signatures you want to hear about or a reference to a hash whose keys are the signatures you want 2 a reference to an array containing the lines in the outline of calls 3 a reference to a sub which takes signatures and returns class and method names

To build the array references and supply the code reference consult UML::Sequence::SimpleSeq, UML::Sequence::JavaSeq, or UML::Sequence::PerlSeq. To see one way to call these look in the supplied genericseq script.

Concurrent Hierarchical State Machine (CHSM) is a language system for specifying concurrent, hierarchical, finite state machines (an implementation of "statecharts") to model and control reactive systems.
CHSM uses its own statechart specification langauge annotated with either C++ or Java code fragments in the tradition of yacc grammars with C code fragments. The generated code is fully object oriented allowing multiple state machines to exist concurrently. The CHSM run-time library is small, efficient, and thread-safe.
CHSM has been used successfullly in production environments such as CERN, Philips, and Qualcomm. There is an independent review from users at CERN.
Enhancements:
- The "dominance" rule has been extended from parent/child transitions to sibling transitions.
- This allows "if-else" transitions to be done more efficiently.

UMMF::UML::MetaMetaModel is an implementation of the UML Meta-Meta-Model (M3).

SYNOPSIS

use UMMF::UML::MetaMetaModel;
my $factory = UMMF::UML::MetaMetaModel->factory;
my $model = $factory->create(Model);
$factory->create(Class, name => Foo, namespace => $model);
...

This package implements a meta-meta-model (M3) for generating the UML metamodel (M2).

UMMF::UML::MetaMetaModel is not an implementation of the MOF; It is actually a subset of the 1.5 Meta-model, as described in UML Spec. 1.5., p.2-13, but with a flattened package namespace.

It is the "Backbone" for generating the meta-model.

The UML 1.5 Meta-model is described in UMMF::UML::MetaModel package, in the ad-hoc language imported by UMMF::UML::Import::MetaMetaModel.

This meta-model is then used to generate the Perl (or Java) code for the classes in UMMF::UML::MetaModel::*.

The same exporters and importers can be used to process M* layers.

Thus, one description of the meta-model can generate multiple implementations.

uml2svg is an XSLT-based tool for converting XMI-compliant UML Diagrams into SVG.
We started the developing uml2svg with six main goals in mind:
- Standard conformance
- Good Documentation
- Modularity
- Extensibility
- Comprehensible SVG
- Multiple diagrams per XMI-file
SVG is a standard language for describing two-dimensional vector graphics in XML. As the open SVG standard gains in popularity and gradually replaces proprietary formats for vectorial graphics, the support provided by the Web browsers is getting better.
Plugins to display SVG exist for most browsers and it is most likely that the next generation of Web browser will provide built-in support for SVG. When that happens there will be no better way to distribute vector graphics on the web. Furthermore, not only web browsers can process SVG in a meaningful way; in fact that is just the tip of the iceberg. SVG can be easily read in, processed, and then transformed into many other formats, being well suited for both text and graphic tools as well as for web agents and screen readers.
UML diagrams are composed of lines, polygons, ellipses and text labels, so they are inherently vectorial. However, the SVG is not very well suited for direct use by UML tools. While some of them can in fact export UML diagrams directly to SVG, they do that by discarding all the information about structure, and converting everything into a shape. Moreover, some tools use the screen-capture function provided by their environment (such as java2d) and then they apply a filter to generate SVG out of the "screenshot".
What comes out of that is a pile of meaningless information, which by accident happens to draw a gorgeous diagram. How will a screen reader interpret such a file? How will a web crawler be able to index it? How will a web agent process it in a meaningful way? A program needs the semantic information that the humans can extract just by looking at a picture. For a machine, an obfuscated SVG file is not easier to process than a PNG file or any other image.
Although for humans it is better to be able to scale the image, for a program this is irrelevant. Programs need a way to "understand" the semantics of the UML models to be able to process and interchange them in a meaningfull way. This was the main idea behind the XML Metadata Interchange (XMI), an OMG specification for model interchange. And probably the best use that XMI has found so far is the exchange of UML models between different modeling tools. And while the XMI provides a standard way for tools to represent models as XML documents, it is still limited to the model elements only.
With the introduction of the UML 2.0 Diagram Interchange Specification as part of the upcoming UML 2.0 standard, it will become possible for tools to exchange the models together with the layout of the diagrams. We think that, once this specification appears, XMI will be used averywhere. Not only will the tools be able to exchange diagrams, but could even represent them internaly as DOM trees. Have you ever considered drawing your UML diagrams online, using only a web browser? This could be done even now by using a custom SVG syntax for the DOM tree, but a solution based on XMI could do even better and be a standard at the same time.
Therefore, we believe that with the advent of UML 2.0 and the increase in the use of SVG, the need for transformations between XMI and SVG will be great. Nevertheless when the uml2svg project was started, there was hardly any good open-source solution to convert XMI diagams into SVG.
The UML 2.0 Diagram Interchange Adopted Specification in its current incipient form references a set of XSL transformations. Although the standard draft covers them to a large extent, the link is actually broken (you can try for yourself). It has been broken for more than a year and most likely it will stay like that forever.
The personal webpage of Professor Mario Jeckle provides an online transformation service capable of dynamically generating SVG from XMI-compliant XML files. The XSL files accomplishing the transformations are also available on that website. These transformations are monolithic and not well documented (the only documentation is in the code, and it is generally written in German). With the tragic accident that took the life of Professor Jeckle, the transformations have no longer been maintained.
Finally, the STZ-IDA research center in Karlsruhe had to convert UML diagrams to SVG, as part of one of their projects. The XSLT stylesheet they created for this purpose was named xmi2svg and is available under the terms of the MIT license. At the time we started work on uml2svg the only type of diagrams supported was class diagrams.
Recently the package reached version 0.2 and it supports more diagram types, without major changes in the code (the opposite of what we were expecting). Andreas Junghans, the author of xmi2svg, provided us with a lot of insightful hints which helped us eliminate many glitches in uml2svg. It looks that the development of uml2svg and xmi2svg will continue in parallel, at least for a while. The good thing about this is that the two (quite different) implementations prove each others validity and the features tend to propagate freely from one side to the other. However, this comes with the prize of having to maintain two different code-trees and possibly confusing some users.
We did not like the two existing solutions because they were:
incomplete - just prototypes, not well suited for production environment
monolithic - hard to maintain and extend
not documented - hard to understand
At first sight, we thought we could find a way to improve one of the existing solutions and just add the features we needed. However, we slowly came to the conclusion that it would be better if we started anew. There are things one can fix in a project, but that does not include what we thought is was bad design. The fact that the two implementations presented above are open source helped us get quickly on the way with our own project.
Enhancements:
- Two annoying bugs were fixed.
- The site and documentation were updated.

UMLMON is a complete run time environment for User Mode Linux. There is a separate monitor daemon for every VM.
UMLMON project creates the run time environment and starts the VM by executing the UML kernel. The daemon also determines the arguments that are passed to the UML kernel, and includes special support to set up arguments for memory size, virtual disks, virtual network interfaces, and console channels in a convenient way.
UMLMON also includes routines to do certain administration tasks like the creation of disks.
The team UMLMON + UML can be applied in the following areas:
- Server consolidation: Improve the utilization of server hardware, and ease the operation of servers.
- Virtual security zones: Instead of building demilitarized zones (DMZ) with real hardware, it is a cost-effective alternative to set up purely virtual DMZs on a single host.
- Virtual hosting: A cheap version of server hosting is virtual hosting; instead of leasing real computers to customers, virtual machines are used.
- Laboratory nets: By using virtual machines it is possible to build cheap laboratory nets, e.g. to test software in real network environments.
- Training environments: One can use virtual machines for Linux trainings where participants can get true administrators priviledges without any risks.
Enhancements:
- This release no longer call the problematic glibc function getgrouplist, which is often broken (symptom: segmentation fault immediately after starting umlmon).

SeSAm (Shell for Simulated Agent Systems) provides a generic environment for modelling and experimenting with agent-based simulation.
We specially focused on providing a tool for the easy construction of complex models, which include dynamic interdependecies or emergent behaviour.
SeSAm agents consist of a body, that contains a set of state variables and a behaviour that is implemented in form of UML-like diagram. Based on an extensive number of primitive components, a user is able to design a simulation graphically without knowing the syntax of a traditional programming language.
The model specification is executable in the same environment and the dynamics of this simulation may be observed. As there are freely configurable instruments for gathering data and scripting options for constructing simulation experiments, SeSAm is a highly valuable tool for MAS simulations especially for complex models with flexible agent behaviour and interactions.
Main features:
- Easy visual agent modelling,
- Flexible environment and situation definition,
- The whole power of a programming language,
- Integrated graphical simulation analysis ,
- Distribution of simulation runs in your LAN ,
- and many further features.....