From [the XSD 1.0 spec on w3.org](http://www.w3.org/TR/xmlschema-1/#Instance_Document_Constructions):

&gt; The XML representation of schema
&gt; components uses a vocabulary
&gt; identified by the namespace name
&gt; http://www.w3.org/2001/XMLSchema. For
&gt; brevity, the text and examples in this
&gt; specification use the prefix xs: to
&gt; stand for this namespace; in practice,
&gt; any prefix can be used.

in the end **xs** or **xsd** are only prefixes. XSD is used for example more by Microsoft schemas.

The important is how you declare the namespace.

    &lt;xs:schema xmlns:xs=&quot;http://www.w3.org/2001/XMLSchema&quot;&gt;
      ...
    &lt;/xs:schema&gt;

or

    &lt;xsd:schema xmlns:xsd=&quot;http://www.w3.org/2001/XMLSchema&quot;&gt;
      ...
    &lt;/xsd:schema&gt;

should be equivalent.



There is **no difference**, it is just a matter of choice

The `xs:` and `xsd:` are called namespace prefixes. They are declared using `xmlns` elements in the root element.

By convention people tend to choose either `xs:` or `xsd:` and map that to `http://www.w3.org/2001/XMLSchema`. Having both in a single document is confusing and should be avoided.

Check your `xmlns` declarations to determine what the namespaces are.

I have been wondering if Vim has the capability to smart wrap lines of code, so that it keeps the same indentation as the line that it is indenting. I have noticed it on some other text editor, such as e-text editor, and found that it helped me to comprehend what I&#39;m looking at easier.

For example rather than

    &lt;p&gt;
        &lt;a href=&quot;http://www.example.com&quot;&gt;
            This is a bogus link, used to demonstrate
    an example
        &lt;/a&gt;
    &lt;/p&gt;

it would appear as 

    &lt;p&gt;
        &lt;a href=&quot;somelink&quot;&gt;
            This is a bogus link, used to demonstrate
            an example
        &lt;/a&gt;
    &lt;/p&gt;

Smart Wrap in Vim

For a developer with a Java background, I am interested in exploring software development using the ASP.NET tools/platform as well. 

Java web applications (.jsp and servlets) can run on many server platforms.

**Question**: Will a .NET web application be able to run in a Linux based server? Considering the scenario of not being able to use a Windows server for hosting a web app. 


Running ASP.Net on a Linux based server

What is the difference between the `xs` and `xsd` prefixes in XML schema files?

Difference between xs and xsd in XML schema file?

<p>What is the difference between the <code>xs</code> and <code>xsd</code> prefixes in XML schema files?</p>


I can not find any info on how to parse xml documents and access elements.

I have found two ways to parse the xml document

    (clojure.zip/xml-zip (clojure.xml/parse file))

and 

    (parse-seq file)

but i can seem to find any info on how to process the resulting structure?

Source file&#39;s refers to zip-query.clj on how to query the result but that seems to missing too.

Clojure XML Parsing

I have an `org.w3c.dom.Element` object passed into my method. I need to see the whole xml string including its child nodes (the whole object graph).  I am looking for a method that can convert the `Element` into an xml format string that I can `System.out.println` on.  Just `println()` on the &#39;Element&#39; object won&#39;t work because `toString()` won&#39;t output the xml format and won&#39;t go through its child node.  Is there an easy way without writing my own method to do that? Thanks.

How to I output org.w3c.dom.Element to string format in java?

Is there an escape character for a double quote in xml?  I want to write a tag like:

    &lt;parameter name=&quot;Quote = &quot; &quot;&gt;

but if I put &quot;, then that means string has ended.  I need something like this (c++):

    printf(&quot;Quote = \&quot; &quot;);

Is there a character to write before the double quote to escape it?

Escape double quote character in XML

Is there an easy way to convert a Nokogiri XML document to a Hash?

Something like Rails&#39; `Hash.from_xml`.

Convert a Nokogiri document to a Ruby Hash

Using the following simple code:

	package test;
	
	import java.io.*;
	import javax.xml.transform.*;
	import javax.xml.transform.stream.*;
	
	public class TestOutputKeys {
		public static void main(String[] args) throws TransformerException {
	
			// Instantiate transformer input
			Source xmlInput = new StreamSource(new StringReader(
					&quot;&lt;!-- Document comment --&gt;&lt;aaa&gt;&lt;bbb/&gt;&lt;ccc/&gt;&lt;/aaa&gt;&quot;));
			StreamResult xmlOutput = new StreamResult(new StringWriter());
	
			// Configure transformer
			Transformer transformer = TransformerFactory.newInstance()
					.newTransformer(); // An identity transformer
			transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, &quot;testing.dtd&quot;);
			transformer.setOutputProperty(OutputKeys.INDENT, &quot;yes&quot;);
			transformer.transform(xmlInput, xmlOutput);
	
			System.out.println(xmlOutput.getWriter().toString());
		}
	
	}

I get the output:

	&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
	&lt;!-- Document comment --&gt;&lt;!DOCTYPE aaa SYSTEM &quot;testing.dtd&quot;&gt;

	&lt;aaa&gt;
	&lt;bbb/&gt;
	&lt;ccc/&gt;
	&lt;/aaa&gt;

Question A: The doctype tag appears after the document comment. Is it possible to make it appear before the document comment?

Question B: How do I achieve indentation, using only the JavaSE 5.0 API?
This question is essentially identical to &lt;a href=&quot;https://stackoverflow.com/questions/139076/how-to-pretty-print-xml-from-java&quot;&gt;How to pretty-print xml from java&lt;/a&gt;, __however__ almost all answers in that question depend on external libraries. The only applicable answer (posted by a user named Lorenzo Boccaccia) which only uses java&#39;s api, is basically equal to the code posted above, but does not work for me (as shown in the output, i get no indentation).

I am guessing that you have to set the amount of spaces to use for indentation, as many of the answers with external libraries do, but I just cannot find where to specify that in the java api. Given the fact that the possibility to set an indentation property to &quot;yes&quot; exists in the java api, it must be possible to perform indentation somehow. I just can&#39;t figure out how.

Pretty-printing output from javax.xml.transform.Transformer with only standard java api (Indentation and Doctype positioning)

In ASP.NET C# I have a struct:

    public struct Data
    {
        public int item1;
        public int item2;
        public int category_id;
        public string category_name;
    }

and I have a List of those.  I want to select `category_id` and `category_name`, running a `DISTINCT` and finally an `ORDERBY` on `category_name`.

Here&#39;s what I have now:

    List&lt;Data&gt; listObject = getData();
    string[] catNames = listObject
                        .Select(i=&gt; i.category_name)
                        .Distinct()
                        .OrderByDescending(s =&gt; s)
                        .ToArray();

This obviously just gets the category name.  My question is, how do I get multiple fields, and what data structure will I store this in (not a `string[]`)?

EDIT

Using a list of structs is not set in stone.  If it would be advisable to change my backing data structure to make selects easier (I&#39;ll be writing a lot of these) then I&#39;d gladly take recommendations.

Select Multiple Fields from List in Linq

I am exploring the `HashSet&lt;T&gt;` type, but I don&#39;t understand where it stands in collections.

Can one use it to replace a `List&lt;T&gt;`? I imagine the performance of a `HashSet&lt;T&gt;` to be better, but I couldn&#39;t see individual access to its elements.

Is it only for enumeration?

When should I use the HashSet&lt;T&gt; type?

C++0x is introducing `unordered_set` which is available in `boost` and many other places. What I understand is that `unordered_set` is hash table with `O(1)` lookup complexity. On the other hand, `set` is nothing but a tree with `log(n)` lookup complexity. **Why on earth would anyone use `set` instead of `unordered_set`? i.e is there a need for `set` anymore?**

Why would anyone use set instead of unordered_set?

Is there any data structure in C# that is like a dictionary but that only has a key and doesn&#39;t have a value.  I basically want a list of integers that I can quickly lookup and see if a certain value is in the list.  Granted, for my current use, a List&lt;int&gt; would not cause any performance problem, but it just doesn&#39;t seem to fit well with the intent of what my code is doing.

C# Data Structure Like Dictionary But Without A Value

I need a data structure that is a LinkedHashMap and is thread safe.

How can I do that ?

Does java have a &quot;LinkedConcurrentHashMap&quot; data structure?

I&#39;m currently using JAXB to generate java classes in order to unmarshall XML. Now I would like to create a new schema very similar to the first and have the classes that are generated implement the same interface.

Say for example, I have two schema files which define XML with similar tags:

adult.xsd

&lt;!-- language: xml --&gt;

	&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
	&lt;xs:element name=&quot;Person&quot;&gt;
	  &lt;xs:complexType&gt;
	    &lt;xs:sequence&gt;
	      &lt;xs:element name=&quot;Name&quot; type=&quot;xs:string&quot; /&gt;
	      &lt;xs:element name=&quot;Age&quot; type=&quot;xs:integer&quot; /&gt;
	      &lt;xs:element name=&quot;Job&quot; type=&quot;xs:string&quot; /&gt;
	    &lt;/xs:sequence&gt;
	  &lt;/xs:complexType&gt;
	&lt;/xs:element&gt;

kid.xsd

&lt;!-- language: xml --&gt;

	&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
	&lt;xs:element name=&quot;Person&quot;&gt;
	  &lt;xs:complexType&gt;
	    &lt;xs:sequence&gt;
	      &lt;xs:element name=&quot;Name&quot; type=&quot;xs:string&quot; /&gt;
	      &lt;xs:element name=&quot;Age&quot; type=&quot;xs:integer&quot; /&gt;
	      &lt;xs:element name=&quot;School&quot; type=&quot;xs:string&quot; /&gt;
	    &lt;/xs:sequence&gt;
	  &lt;/xs:complexType&gt;
	&lt;/xs:element&gt;

Using JAXB and XJC I&#39;d like to generate two class files:

    public class Adult implements Person {
        ...
        public String getName() { ... }
        public int getAge() { ... }
        public String getJob { ... }
    }

    public class Kid implements Person {
        ...
        public String getName() { ... }
        public int getAge() { ... }
        public String getSchool { ... }
    }

where the Person interface defines the `getName()` and `getAge()` methods.

I&#39;ve looked at some of the [documentation][1] for mapping interfaces but this appears to only be for the situation when you already have java classes that you want to map to a DOM.

Also, I&#39;ve tried to use this [external plugin][2] but it doesn&#39;t appear to work. Here is my xjb binding file:

&lt;!-- language: xml --&gt;

	&lt;jxb:bindings version=&quot;1.0&quot; 
	  xmlns:jxb=&quot;http://java.sun.com/xml/ns/jaxb&quot; 
	  xmlns:xs=&quot;http://www.w3.org/2001/XMLSchema&quot; 
	  xmlns:xjc=&quot;http://java.sun.com/xml/ns/jaxb/xjc&quot;
	  xmlns:ext=&quot;http://xml.w-wins.com/xjc-plugins/interfaces&quot;
	  jxb:extensionBindingPrefixes=&quot;xjc&quot;&gt;
	
	    &lt;jxb:bindings schemaLocation=&quot;xsd/adult.xsd&quot; node=&quot;xs:schema/xs:complexType[@name=&#39;Person&#39;]&quot;&gt;
	        &lt;ext:interface&gt;mypackage.Hello&lt;/ext:interface&gt; 
	    &lt;/jxb:bindings&gt;
	
	&lt;/jxb:bindings&gt;

but this gives the following error:

&lt;!-- language: none --&gt;

	$ java -cp &quot;lib/activation.jar;lib/InterfacesXJCPlugin.jar;lib/jaxb1-impl.jar;lib/jaxb-api.jar;lib/jaxb-xjc.jar;lib/jsr173_1.0_api.jar&quot; com.sun.tools.xjc.XJCFacade -p mypackage.myxml -extension -Xinterfaces xsd/adult.xsd -b binding.xjb
	parsing a schema...
	[ERROR] XPath evaluation of &quot;xs:schema/xs:complexType[@name=&#39;Person&#39;]&quot; results in empty target node
	  line 8 of file:/C:/dev/jaxb/jaxb-ri/binding.xjb
	
	Failed to parse a schema.

Is it possible to generate a class with JAXB that implements an interface?

**Update**

I&#39;ve tried using the [Interface Insertion][3] plugin but for some reason can&#39;t get it to work. This is how I&#39;m calling xjc yet it is as if the plugin jar is not getting picked up from the classpath:

&lt;!-- language: none --&gt;

    $ java -cp &quot;lib/xjc-if-ins.jar;lib/jaxb-xjc.jar&quot; com.sun.tools.xjc.XJCFacade -p mypackage -extension -Xifins myschema.xsd -b binding.xjb

I get the error:

&lt;!-- language: none --&gt;

    unrecognized parameter -Xifins

Any ideas?


  [1]: https://jaxb.dev.java.net/guide/Mapping_interfaces.html
  [2]: http://xml.w-wins.com/xjc-plugins/interfaces/
  [3]: https://jaxb2-commons.dev.java.net/interface-insertion/

Generating a JAXB class that implements an interface

I am using xmllint --schema option to validate my XML that looks like this

    &lt;XML&gt;
    &lt;Active&gt;True&lt;/Active&gt;
    &lt;/XML&gt;

In my schema file, I have following line that describes Active element.

    &lt;xsd:element name=&quot;Active&quot; type=&quot;xs:boolean&quot; /&gt;

When I run xmllint, I get error messages that says 

&gt; /tmp/schema_validation.xml:73: element
&gt; Active: Schemas validity error :
&gt; Element &#39;Active&#39;: &#39;True&#39; is not a
&gt; valid value of the atomic type
&gt; &#39;xs:boolean&#39;.

When I change the XML to

    &lt;Active&gt;true&lt;/Active&gt;

Then the error message disappears.

So, it looks like xsd:boolean means it&#39;s all lowercase &quot;true/false&quot; but not &quot;True/False&quot; to xmllint.. My question is, how can I make xmllint to accept &quot;True&quot; for xsd:boolean type? Or is there different tools that I can use that will validate this XML? Changing the XML or schema is not my option at this point.

Thanks!

xsd:boolean element type accept &quot;true&quot; but not &quot;True&quot;. How can I make it accept it?

Documentation seems to say that it references another element in the schema, but how could it be used - I&#39;ve never seen it in schemas that I have worked with.

Anyone got any nice use cases or something that could explain its use further?


What does the ref attribute on an element in an XSD do?

What does `elementFormDefault` do, and when should it be used?

So I found some definitions for `elementFormDefault` values:

&gt; **qualified** - elements and attributes
&gt; are in the targetNamespace of the
&gt; schema 

&gt;**unqualified** - elements and
&gt; attributes do not have a namespace

So from that definition I would think that if a schema is set to qualified then why must you prefix the type with the namespace?  And what are the scenarios that you would even have one set to unqualified for that matter?  I tried Googling, but all I got were a couple W3C pages that were extremely hard to understand.


This is the file I am working with right now, why do I need to declare the type as `target:TypeAssignments` when I declare the `targetNamespace` as the same one as `xmlns:target`?

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;schema xmlns=&quot;http://www.w3.org/2001/XMLSchema&quot;
            xmlns:target=&quot;http://www.levijackson.net/web340/ns&quot;
            targetNamespace=&quot;http://www.levijackson.net/web340/ns&quot; 
            elementFormDefault=&quot;qualified&quot;&gt;
      &lt;element name=&quot;assignments&quot;&gt;
        &lt;complexType&gt;
          &lt;sequence&gt;
            &lt;element name=&quot;assignments&quot; type=&quot;target:TypeAssignments&quot;
                     minOccurs=&quot;1&quot; maxOccurs=&quot;unbounded&quot;/&gt;
          &lt;/sequence&gt;
        &lt;/complexType&gt;
      &lt;/element&gt;
      &lt;complexType name=&quot;TypeAssignments&quot;&gt;
        &lt;sequence&gt;
          &lt;element name=&quot;assignment&quot; type=&quot;target:assignmentInfo&quot;
                   minOccurs=&quot;0&quot; maxOccurs=&quot;unbounded&quot;/&gt;
        &lt;/sequence&gt;
      &lt;/complexType&gt;
      &lt;complexType name=&quot;assignmentInfo&quot;&gt;
        &lt;sequence&gt;
          &lt;element name=&quot;name&quot; type=&quot;string&quot;/&gt;
          &lt;element name=&quot;page&quot; type=&quot;target:TypePage&quot;/&gt;
          &lt;element name=&quot;file&quot; type=&quot;target:TypeFile&quot; 
                   minOccurs=&quot;0&quot; maxOccurs=&quot;unbounded&quot;/&gt;
        &lt;/sequence&gt;
        &lt;attribute name=&quot;id&quot; type=&quot;string&quot; use=&quot;required&quot;/&gt;
      &lt;/complexType&gt;
      &lt;simpleType name=&quot;TypePage&quot;&gt;
        &lt;restriction base=&quot;integer&quot;&gt;
          &lt;minInclusive value=&quot;50&quot; /&gt;
          &lt;maxInclusive value=&quot;498&quot; /&gt;
        &lt;/restriction&gt;
      &lt;/simpleType&gt;
      &lt;simpleType name=&quot;TypeFile&quot;&gt;
        &lt;restriction base=&quot;string&quot;&gt;
          &lt;enumeration value=&quot;.xml&quot; /&gt;
          &lt;enumeration value=&quot;.dtd&quot; /&gt;
          &lt;enumeration value=&quot;.xsd&quot; /&gt;
        &lt;/restriction&gt;
      &lt;/simpleType&gt;
    &lt;/schema&gt;



What does elementFormDefault do in XSD?

I have a DTD that I need to convert to an XSD (XML schema) file.  Is there a free utility or simple way to accomplish this?

Content Type	Original Author	Original Content on Stackoverflow
Question	unknown (google)	View Question on Stackoverflow
Solution 1 - Xml	Drake	View Answer on Stackoverflow
Solution 2 - Xml	carpinchosaurio	View Answer on Stackoverflow
Solution 3 - Xml	Harshal Bhamare	View Answer on Stackoverflow

Difference between xs and xsd in XML schema file?

Xml Problem Overview

Xml Solutions

Solution 1 - Xml

Solution 2 - Xml

Solution 3 - Xml

Running ASP.Net on a Linux based server

Smart Wrap in Vim

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