Real World XML

Building a Document from Pieces

One way to use external general entities is to build a document from pieces, treating each piece as a general entity. Here's an example. In this case, I'm including an entity that refers to the file ch04_06.xml in my document:

Listing . ch04_05.xml

<?xml version = "1.0" standalone="no"?> <!DOCTYPE DOCUMENT [ <!ELEMENT DOCUMENT (CUSTOMER)*> <!ELEMENT CUSTOMER (NAME,DATE,ORDERS)> <!ELEMENT NAME (LAST_NAME,FIRST_NAME)> <!ELEMENT LAST_NAME (#PCDATA)> <!ELEMENT FIRST_NAME (#PCDATA)> <!ELEMENT DATE (#PCDATA)> <!ELEMENT ORDERS (ITEM)*> <!ELEMENT ITEM (PRODUCT,NUMBER,PRICE)> <!ELEMENT PRODUCT (#PCDATA)> <!ELEMENT NUMBER (#PCDATA)> <!ELEMENT PRICE (#PCDATA)> <!ENTITY data SYSTEM "ch04_06.xml"> ]> <DOCUMENT> &data; </DOCUMENT> ...