XML references external DTD file

XML references external DTD file

<! DOCTYPE root element name SYSTEM "Uri/url" >

<! DOCTYPE root element name public "common name" "URL" >

Using the Chinese version xmlspy an error will appear here, prompting

The direct force save is good, the browser can read to the DTD file, and execute.

Another way is: use. Replace! (Use a bit, the property has no effect, do not know what is the reason)

<? DOCTYPE root element name SYSTEM "Uri/url"?>

<? DOCTYPE root element name public "common name" "URL"?>

Write the DTD file and save it.

Open the browser and see the effect.

Use "!" Effect

Use "?" Effect

What is the reason for asking the German heroes of the XML for their advice? This Chinese version of the XMLSpy error there is no better way to solve.