Migrating Mashups to Use a New Feature or Namespace
To use a new feature from the EMML schema in an existing mashup script, you must update the EMML namespace in your mashup script. You may also need to change the schema location.
For the Mashup Editor, the new schema is installed with the new version of Presto.
1. Open theEMMLfile in theMashup Editor.
2. In the <mashup> element, change the namespace in the following attributes to match the new EMMLversion:
xmlns = the default namespace
xsi:schemaLocation = the location of the
EMML schema
See
EMML
Namespaces for a list of supported namespaces.
With an original namespace like this:<?xml version="1.0"?>
<mashup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.jackbe.com/2008-03-01/EMMLSchema"
xsi:schemaLocation="http://www.jackbe.com/2008-03-01/EMMLSchema
../xsd/EMMLSpec.xsd"
name="myMashup">
You would change the namespace to something like this:
<?xml version="1.0"?>
<mashup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.openmashup.org/schemas/v1.0/EMML"
xsi:schemaLocation="http://www.openmashup.org/schemas/v1.0/EMML
../xsd/EMMLSpec.xsd"
name="myMashup">
3. If the schema file name or location has changed, change the path information in the xsi:schemaLocationattribute.
With an original xsi:schemaLocation like this:
<?xml version="1.0"?>
<mashup
xmlns="http://www.jackbe.com/2007-09-15/JMMLSchema"
xsi:schemaLocation="http://www.jackbe.com/2007-09-15/JMMLSchema
../xsd/JMMLSpec.xsd"
You would change it to something like this:
<?xml version="1.0"?>
<mashup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.openmashup.org/schemas/v1.0/EMML"
xsi:schemaLocation="http://www.openmashup.org/schemas/v1.0/EMML
../xsd/EMMLSpec.xsd"
4. If the mashup uses macros or you want to add macros, you must add or update the xmlns:macroattribute.
You would add this attribute or change it to something like this:
<?xml version="1.0"?>
<mashup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.openmashup.org/schemas/v1.0/EMML"
xsi:schemaLocation="http://www.openmashup.org/schemas/v1.0/EMML
../xsd/EMMLSpec.xsd"
xmlns:macro="http://www.openmashup.org/schemas/v1.0/EMMLMacro"
name="myMashup">
5. If the mashup or macros use Prestoextension elements, such as <presto:presto-meta>, you must add or update the xmlns:prestoattribute.
For example:
<?xml version="1.0"?>
<mashup xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.openmashup.org/schemas/v1.0/EMML"
xsi:schemaLocation="http://www.openmashup.org/schemas/v1.0/EMML
../xsd/EMMLSpec.xsd"
xmlns:macro="http://www.openmashup.org/schemas/v1.0/EMMLMacro"
xmlns:presto="http://www.jackbe.com/schemas/v1.0/EMMLPrestoExtensions"
name="myMashup">
6. Edit the mashup script, if needed, and save your changes.
