No grammar constraints (DTD or XML schema) detected for the document

Xml Problem Overview

I have this dtd : http://fast-code.sourceforge.net/template.dtd But when I include in an xml I get the warning : No grammar constraints (DTD or XML schema) detected for the document. The xml is :

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE templates PUBLIC "//UNKNOWN/" "http://fast-code.sourceforge.net/template.dtd">

<templates>
<template type="INSTANCE_OF_CLASS">
	<description>Used to Create instance of class</description>
	<variation>asasa</variation>
	<variation-field>asasa</variation-field>
	<class-pattern>asasa</class-pattern>
	<getter-setter>setter</getter-setter>
	<allowed-file-extensions>java</allowed-file-extensions>
	<number-required-classes>1</number-required-classes>
	<allow-multiple-variation>false</allow-multiple-variation>
	<template-body>
		<![CDATA[
			// Creating new instance of ${class_name}
			final ${class_name} ${instance} = new ${class_name}();
			#foreach ($field in ${fields})
				${instance}.${field.setter}(${field.value});
			#end
		]]>
	</template-body>
</template>
</templates>

EDIT : I changed the xml, I am getting this error now: > The content of element type "template" must match "(description,variation?,variation-field?,allow- multiple-variation?,class-pattern?,getter-setter?,allowed-file-extensions?,number-required- classes?,template-body)".

Xml Solutions

Solution 1 - Xml

I got rid of this annoying warning by specifying <!DOCTYPE xml> after the <?xml ... > tag instead of specifying something else (like templates in your case).

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

Solution 2 - Xml

This worked for me in Eclipse 3.7.1:

Go to the Preferences window, then XML -> XML Files -> Validation.

Then in the Validating files section of the preferences panel on the right, choose Ignore in the drop down box for the "No grammar specified" preference. You may need to close the file and then reopen it to make the warning go away.

Solution 3 - Xml

Answer:

Comments on each piece of your DTD below. Refer to official spec for more info.

  <!
  DOCTYPE ----------------------------------------- correct
  templates --------------------------------------- correct  Name matches root element.
  PUBLIC ------------------------------------------ correct  Accessing external subset via URL.
  "//UNKNOWN/" ------------------------------------ invalid? Seems useless, wrong, out-of-place.
                                                             Safely replaceable by DTD URL in next line.
  "http://fast-code.sourceforge.net/template.dtd" - invalid  URL is currently broken.
  >

Simple Explanation:

An extremely basic DTD will look like the second line here:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE nameOfYourRootElement>
<nameOfYourRootElement>
</nameOfYourRootElement>

Detailed Explanation:

DTDs serve to establish agreed upon data formats and validate the receipt of such data. They define the structure of an XML document, including:

a list of legal elements
special characters
character strings
and a lot more

E.g.

<!DOCTYPE nameOfYourRootElement
[
<!ELEMENT nameOfYourRootElement (nameOfChildElement1,nameOfChildElement2)>
<!ELEMENT nameOfChildElement1 (#PCDATA)>
<!ELEMENT nameOfChildElement2 (#PCDATA)>
<!ENTITY nbsp "&#xA0;"> 
<!ENTITY author "Your Author Name">
]>

Meaning of above lines...
Line 1) Root element defined as "nameOfYourRootElement"
Line 2) Start of element definitions
Line 3) Root element children defined as "nameOfYourRootElement1" and "nameOfYourRootElement2"
Line 4) Child element, which is defined as data type #PCDATA
Line 5) Child element, which is defined as data type #PCDATA
Line 6) Expand instances of   to   when document is parsed by XML parser
Line 7) Expand instances of &author; to Your Author Name when document is parsed by XML parser
Line 8) End of definitions

Solution 4 - Xml

The Real Solution:

add <!DOCTYPE something> to the begining of each problematic XML,

after the xml tag <?xml version="1.0" encoding="utf-8"?>

you can write anything for doctype, but basically it's supposed to be manifest, activity, etc. from what I understand

Solution 5 - Xml

Have you tried to add a schema to xml catalog?

in eclipse to avoid the "no grammar constraints (dtd or xml schema) detected for the document." i use to add an xsd schema file to the xml catalog under

"Window \ preferences \ xml \ xml catalog \ User specified entries".

Click "Add" button on the right.

Example:

<?xml version="1.0" encoding="UTF-8"?>
<HolidayRequest xmlns="http://mycompany.com/hr/schemas">
    <Holiday>
        <StartDate>2006-07-03</StartDate>
        <EndDate>2006-07-07</EndDate>
    </Holiday>
    <Employee>
        <Number>42</Number>
        <FirstName>Arjen</FirstName>
        <LastName>Poutsma</LastName>
    </Employee>
</HolidayRequest>

From this xml i have generated and saved an xsd under: /home/my_user/xsd/my_xsd.xsd

As Location: /home/my_user/xsd/my_xsd.xsd

As key type: Namespace name

As key: http://mycompany.com/hr/schemas

Close and reopen the xml file and do some changes to violate the schema, you should be notified

Solution 6 - Xml

Add DOCTYPE tag ...

In this case:

<!DOCTYPE xml>

Add after:

<?xml version="1.0" encoding="UTF-8"?>

So:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

Solution 7 - Xml

Try understanding the suggestion given in warning messages, it's helps sometime.

I also had the same issues, after doing some research i found the solution and fixed by adding the below line at the beginning

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

which lead to some other issue in my case. Which i solved by reading the suggestions, which again turned into the another problem, which has been solved understanding the original cause, that the first link was broken (not found). Below are the step by step images which explains what has been done to resolve the issue completely.

Solution 8 - Xml

A new clean way might be to write your xml like so:

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE rootElement>

<rootElement>
 ....
</rootElement>

The above works in Eclipse Juno+

Solution 9 - Xml

For me it was a Problem with character encoding and unix filemode running eclipse on Windows:

Just marked the complete code, cutted and pasted it back (in short: CtrlA-CtrlX-CtrlV) and everything was fine - no more "No grammar constraints..." warnings

Solution 10 - Xml

I can't really say why you get the "No grammar constraints..." warning, but I can provoke it in Eclipse by completely removing the DOCTYPE declaration. When I put the declaration back and validate again, I get this error message:

> The content of element type "template" > must match > "(description+,variation?,variation-field?,allow-multiple-variation?,class-pattern?,getter-setter?,allowed-file-extensions?,template-body+).

And that is correct, I believe (the "number-required-classes" element is not allowed).

Solution 11 - Xml

i know this is old but I'm passing trought the same problem and found the solution in the spring documentation, the following xml configuration has been solved the problem for me.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/tx 

<!-- THIS IS THE LINE THAT SOLVE MY PROBLEM -->
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd 

http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd">

before I put the line above as sugested in this forum topic , I have the same warning message, and placing this...

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xml>

and it give me the following warning message...

The content of element type "template" must match "
(description,variation?,variation-field?,allow- multiple-variation?,class-
pattern?,getter-setter?,allowed-file-extensions?,number-required- 
classes?,template-body)".

so just try to use the sugested lines of my xml configuration.

Solution 12 - Xml

This may be due to turning off validation in eclipse.

Solution 13 - Xml

Solved this issue in Eclipse 3.5.2. Two completely identical layouts of which one had the warning. Closed down all tabs and when reopening the warning had disappeared.

Solution 14 - Xml

copy your entire code in notepad.
temporarily save the file with any name [while saving the file use "encoding" = UTF-8 (or higher but UTF)].
close the file.
open it again.
copy paste it back on your code.

error must be gone.

Solution 15 - Xml

I used a relative path in the xsi:noNamespaceSchemaLocation to provide the local xsd file (because I could not use a namespace in the instance xml).

<?xml version="1.0" encoding="UTF-8"?>
<root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="../project/schema.xsd">
</root>

Validation works and the warning is fixed (not ignored).

https://www.w3schools.com/xml/schema_example.asp

Solution 16 - Xml

I too had the same problem in eclipse using web.xml file
it showed me this " no grammar constraints referenced in the document "

but it can be resolved by adding tag
after the xml tag i.e. <?xml version = "1.0" encoding = "UTF-8"?>

Solution 17 - Xml

Here's the working solution for this problem:

Step 1: Right click on project and go to properties

Step 2: Go to 'libraries' and remove the project's ' JRE system library'

Step 3: Click on 'Add library'-->'JRE System Library' -->select 'Workspace default JRE'

Step 3: Go to 'Order and Export' and mark the newly added ' JRE system library'

Step 4: Refresh and Clean the project

Eureka! It's working :)

Solution 18 - Xml

What I found to be the solution was something very very simple that I think you should try before tinkering with the preferences. In my case I had this problem in a strings file that had as a base tag "resources" ...all I did was delete the tag from the top and the bottom, clean the project, save the file and reinsert the tag. The problem has since disappeared and never gave me any warnings. It may sound to simple to be true but hey, sometimes it's the simplest things that solve the problems. Cheers

Content Type	Original Author	Original Content on Stackoverflow
Question	fastcodejava	View Question on Stackoverflow
Solution 1 - Xml	Sabuj Hassan	View Answer on Stackoverflow
Solution 2 - Xml	Marc Bernstein	View Answer on Stackoverflow
Solution 3 - Xml	Pup	View Answer on Stackoverflow
Solution 4 - Xml	Amir.F	View Answer on Stackoverflow
Solution 5 - Xml	user1374968	View Answer on Stackoverflow
Solution 6 - Xml	Jorge Bastida Cano	View Answer on Stackoverflow
Solution 7 - Xml	Bhupendra Kumar	View Answer on Stackoverflow
Solution 8 - Xml	Damilola	View Answer on Stackoverflow
Solution 9 - Xml	user3022856	View Answer on Stackoverflow
Solution 10 - Xml	mzjn	View Answer on Stackoverflow
Solution 11 - Xml	José Oliveira	View Answer on Stackoverflow
Solution 12 - Xml	Chotka	View Answer on Stackoverflow
Solution 13 - Xml	delformo	View Answer on Stackoverflow
Solution 14 - Xml	sifr_dot_in	View Answer on Stackoverflow
Solution 15 - Xml	Max Hohenegger	View Answer on Stackoverflow
Solution 16 - Xml	Syed Peera Saheb	View Answer on Stackoverflow
Solution 17 - Xml	user2372633	View Answer on Stackoverflow
Solution 18 - Xml	Francesco D.M.	View Answer on Stackoverflow