Cloud platforms Lead to Open and Universal access
for people with Disabilities and for All
www.cloud4all.eu
Progress on Rule based matchmaker+alignemnt tool
CERTH/ITI
Votis Konstantinos
Achievements
• Ontology on-line browsing and downloading
• Ontology Alignment tool
• API for the communication of the MatchMaker
with the ontology
• MatchMaker - OpenRules support
• Integration of the CLOUD4All MatchMaker
with the GPII framework
Ontology on-line browsing & downloading
Ontology on-line browsing
Ontology Alignment tool
– Add a new solution –
Ontology Alignment tool
– Return matching ontology concepts –
Ontology Alignment tool
– Set the value of default properties –
Ontology Alignment tool
– Add new settings & align them –
Ontology Alignment tool
– The new solution has been added to the ontology –
API for the communication of the
MatchMaker with the ontology
• Functions for getting the instances of every
class contained in the ontology
• Functions for getting the instances that meet
specific criteria
– e.g., get all the screen readers running on Linux (in
general) or get all the screen readers running on
Linux Debian 6
• The implementation was based on the Apache
Jena framework
API for the communication of the
MatchMaker with the ontology (2)
•Example:
•//------•//DEVICES
•//------•
•//get DTVDevices
•ArrayList<Device> allInstances_DTVDevice =
getInstances(DTVDevices_ID);
•if(printDebugInfo)
•{
•
for(int i=0; i<allInstances_DTVDevice.size(); i++)
•
System.out.println(allInstances_DTVDevice.get(i).toString());
•}
CLOUD4All MatchMaker
– OpenRules support
CLOUD4All MatchMaker
– Integration with the GPII framework
• The GPII framework is based on Javascript
• The CLOUD4All rule-based MatchMaker is
based on Java
• The Google Web Toolkit (GWT) has been used
to enable the use of the CLOUD4All
MatchMaker through Javascript
– Thus, the CLOUD4All rule-based MatchMaker can
be integrated into the GPII framework
GPII - The “Flat” MatchMaker
• Simplest possible algorithm
• Index into the “skeleton solution input image”
with all of the leaves derived from the user’s
profile
• Pick every solution for which there is an exact
match
GPII MatchMaker - Some useful
MatchMaker Primitives
• Compute the Input Image of a solution:
{
"type": "gpii.integrationTesting.mockSettingsHandler",
"capabilities": ["display.screenEnhancement"],
"capabilitiesTransformations": {
"mag-factor": "display.screenEnhancement.magnification",
"show-cross-hairs": "display.screenEnhancement.showCrosshairs",
…
• Step 1: convert to leaf representation
with matchMaker.computeLeavesFromSolution
[
"display.screenEnhancement.magnification",
"display.screenEnhancement.showCrosshairs",
"display.screenEnhancement.tracking",
"display.screenEnhancement"
];
GPII MatchMaker - Input Image Computation
[
"display.screenEnhancement.magnification",
"display.screenEnhancement.showCrosshairs",
"display.screenEnhancement.tracking",
"display.screenEnhancement"
];
• Step 2: Convert to “skeleton model”
using matchMaker.pathsToSkeleton
var magnifierSkeleton = {
display: {
screenEnhancement: {
magnification: {},
showCrosshairs: {},
tracking: {}
}
}
};
GPII MatchMaker
User – solution matching
var sammyProfile = {
"display": {
"screenEnhancement": {
"fontSize": 24,
"foregroundColor": "white",
"backgroundColor": "black",
"fontFace": {
"fontName": ["Comic Sans"],
"genericFontFace": "sans serif"
},
"magnification": 2.0,
"tracking": "mouse",
"invertImages": true,
"-provisional-showCrosshairs": true
}
}
};
var magnifierSkeleton = {
display: {
screenEnhancement: {
magnification: {},
showCrosshairs: {},
tracking: {}
}
}
};
GPII MatchMaker
- Solution/User profiles
18
GPII – MatchMaker results
CLOUD4All rule-based MatchMaker
within the GPII framework
User Profile 1
User Profile 2
User Profile 3
Goal: If the user uses a screen
reader, find the suitable
screen reader according to
the defined rules.
Take into account the defined rules
- If the user uses a screen reader
- Get system’s time
- Return the screen reader(s) that run(s)
on the platform used in the current time
CLOUD4All rule-based MatchMaker
within the GPII framework