The Module
Let us see how we use that class to generate some error codes in different languages (English and Dutch for example).
The phrasebook is a simple XML file:
|
<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE phrasebook [ <!ELEMENT phrasebook (dictionary)*> <!ELEMENT dictionary (phrase)*> <!ATTLIST dictionary name CDATA #REQUIRED> <!ELEMENT phrase (#PCDATA)> <!ATTLIST phrase name CDATA #REQUIRED> ]> <phrasebook> <dictionary name="EN"> <phrase name="MISUSE_OF_MANUAL_TEMPLATE_NAME"> The name $name can be used only as manual template </phrase> ... </dictionary> <dictionary name="NL"> <phrase name="MISUSE_OF_MANUAL_TEMPLATE_NAME"> De naam $name mag enkle gebriuk worden als webboek template </phrase> ... </dictionary> </phrasebook> |
- The phrasebook file starts with the Document Type Definition (DTD).
- This is used by the XML parser to validate the XML code.
- Then we open the definition of the phrasebook.
- Inside we have one or more definitions of dictionaries.
- Each dictionary will hold the phrases.
- The first dictionary is taken as the default dictionary:
- If a phrase is missing in another dictionary, it will be taken from the first one.
- The phrases can hold placeholders.
- The placeholders look exactly like Perl scalar variables.