targetNamespace and xmlns without prefix, what is the difference?

Question

In an xml schema document, if I have both the targetNamespace and the xmlns without a prefix.

Answer 1

Other answers are good here, so I will not repeat their explanations here. However, if anyone from Java background, find its simpler, here is the analogy I came up with -

1. .xsd document is the artifact/.jar file

2. xmlns is the

   package com.example
   

   statement, you declare at the top of your Java classes.

Consider (for analogy), if you had one single package in your Java project, and all the classes are declared and defined within a single outer class. For eg,

    package com.furniture.models

    public class FurnitureShop {

         int noOfTables;
         int noOfChairs;
         int noOfBeds;
         List tables;
         List chairs;
         List beds;

         // and now instead of declaring and defining a class for table/chair/bed in a 
         // separate file, you just add it here 
         public static class Table {
             int height;
             int width;
             int length;
             ...
         }

         public static class Chair {
             String color;
             ChairType chairType;
             ...
         }

         public static class Sofa {
             int price;
             String color;
             ...
         }
    }


This is how different elements are grouped in a single .xsd file, for a new schema.


targetNamespace is the name of the artifact you create. As you can find it out yourself, targetNamespace is used when creating a schema, in an .xsd file.


Once, the artifact(or .xsd file) is created, you'd use it in other projects as follows - 

In a Java project, you'd import the library, using pom.xml (or build.gradle) file as follows - 

    
       com.furniture
       furniture-apis
       1.1.1
    


In XML, you'd "import" the schema using 

    


=== APPENDIX ===

Clarification - 


xmlns is both used as a package statement, as well as the import statement in Java. In .xsd file, xmlns acts as the "package" statement, whereas in .xml files, it acts as the "import" statement.

    

             

                                                        
            
            

              
                
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