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

Question

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

Answer 1

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"?>

Answer 2

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 :)

Answer 3

In my case I have solved this annoying warning by simply adding the <!DOCTYPE xml> after the <?xml ... > tag.

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

Answer 4

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>

Answer 5

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

error must be gone.

Answer 6

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