|Department of Electrical and Computer Engineering|
The main concepts are: linkbase, hypertext network,
link, and anchor. A linkbase is a container for hypertext
networks and/or other linkbases and is implemented as an extension
of a composite component. A hypertext network, which represents for
a logical relationship structure or a traceability link network, contains
links and anchors. A link, representing for a logical relationship,
is an association among a set of anchors. An anchor is a mark used
to denote the region of interest within a component, and it refers
to a logical unit in a component. A hypertext network is defined as
a directed graph-based atomic component. Each link or anchor is represented
by a node in the graph. A directed edge will connect an
Versioned hypermedia functionality is provided in terms of library functions. They can be divided into two groups:
1. Linkbase and hypertext network functions: Users can
We have developed user interfaces to these functionality into the Software Concordance environment and provide a simple editor for hypertext networks. Figure 1 shows a snapshot.
Figure 1. Multiple logical relationship networks on the same set of components
Figure 1 shows two hypertext networks: 1) The one on the left corner plays the role of a graphical makefile. It is versioned as any other components in Molhado. Therefore, when a version of a project is loaded, the graphical makefile is loaded as well. Developers do not need to remember which graphical makefile corresponds to which project version as in classic SCM systems. The bottom right window also shows a dependency hypertext network on the same set of components.
2. Functions for links and anchors are:
Figure 2 shows a hypertext entity editing window.
Figure 2. Hypertext Editing Window
Add versioned hypermedia functionality into SC editors
The editors in the SC environment have been modified to include the Molhado's versioned hypermedia functionality. Figure 3 shows the structured editor for Java programs. When the user right-clicks on a document node, a popup menu is displayed to allow the user to create an anchor at the node and add it to the active hypertext network, or to open the active hypertext network if an anchor is already defined at the node, or to relocate an anchor to a different document node. The user can also create or delete an embedded link at any node. The user is able to traverse among components via embedded links or via the hypertext network. Figure 4 shows the ability to define anchors and HTML hyperlinks within a UML diagram.
Figure 3. Create anchors and embedded links in a Java program
Figure 4. Embedded links and anchors in a UML diagram