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 document  The xml is      lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE templates PUBLIC    UNKNOWN    http   fast-code sourceforge net template dtd  gt    lt templates gt   lt template type  INSTANCE OF CLASS  gt       lt description gt Used to Create instance of class lt  description gt       lt variation gt asasa lt  variation gt       lt variation-field gt asasa lt  variation-field gt       lt class-pattern gt asasa lt  class-pattern gt       lt getter-setter gt setter lt  getter-setter gt       lt allowed-file-extensions gt java lt  allowed-file-extensions gt       lt number-required-classes gt 1 lt  number-required-classes gt       lt allow-multiple-variation gt false lt  allow-multiple-variation gt       lt template-body gt           lt   CDATA                 Creating new instance of   class name              final   class name    instance    new   class name                  foreach   field in   fields                     instance    field setter    field value                 end            gt       lt  template-body gt   lt  template gt   lt  templates gt    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

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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

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Answer     Comments on each piece of your DTD below  Refer to official spec for more info      lt     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     gt      Simple Explanation     An extremely basic DTD will look like the second line here    lt  xml version  1 0  encoding  utf-8   gt   lt  DOCTYPE nameOfYourRootElement gt   lt nameOfYourRootElement gt   lt  nameOfYourRootElement gt      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    lt  DOCTYPE nameOfYourRootElement    lt  ELEMENT nameOfYourRootElement  nameOfChildElement1 nameOfChildElement2  gt   lt  ELEMENT nameOfChildElement1   PCDATA  gt   lt  ELEMENT nameOfChildElement2   PCDATA  gt   lt  ENTITY nbsp   amp  xA0   gt    lt  ENTITY author  Your Author Name  gt    gt    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  amp nbsp  to  amp  xA0  when document is parsed by XML parser Line 7  Expand instances of  amp author  to Your Author Name when document is parsed by XML parser Line 8  End of definitions

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In my case I have solved this annoying warning by simply adding the  lt  DOCTYPE xml gt  after the  lt  xml      gt  tag    lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE xml gt

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Add DOCTYPE tag      In this case     lt  DOCTYPE xml gt    Add after    lt  xml version  1 0  encoding  UTF-8   gt    So     lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE xml gt

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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

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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    lt  xml version  1 0  encoding  UTF-8   gt   lt HolidayRequest xmlns  http   mycompany com hr schemas  gt       lt Holiday gt           lt StartDate gt 2006-07-03 lt  StartDate gt           lt EndDate gt 2006-07-07 lt  EndDate gt       lt  Holiday gt       lt Employee gt           lt Number gt 42 lt  Number gt           lt FirstName gt Arjen lt  FirstName gt           lt LastName gt Poutsma lt  LastName gt       lt  Employee gt   lt  HolidayRequest gt    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

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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

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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   lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE xml gt    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

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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   lt  xml version    1 0  encoding    UTF-8   gt

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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     lt  xml version  1 0  encoding  UTF-8   gt   lt root xmlns xsi  http   www w3 org 2001 XMLSchema-instance      xsi noNamespaceSchemaLocation     project schema xsd  gt   lt  root gt    Validation works and the warning is fixed  not ignored    https   www w3schools com xml schema example asp

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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    lt  xml version  1 0  encoding  UTF-8   gt   lt 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    lt  -- THIS IS THE LINE THAT SOLVE MY PROBLEM -- gt  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  gt    before I put the line above as sugested in this forum topic   I have the same warning message  and placing this       lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE xml gt    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

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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

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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    I know this question is old but it was the first one I found when searching on the warning  so I m posting the answer here for other searchers

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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

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This may be due to turning off validation in eclipse

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A new clean way might be to write your xml like so    lt  xml version  1 0  encoding  UTF-8   gt   lt  DOCTYPE rootElement gt    lt rootElement gt         lt  rootElement gt    The above works in Eclipse Juno

User · Answer

The Real Solution   add  lt  DOCTYPE something gt  to the begining of each problematic XML    after the xml tag  lt  xml version  1 0  encoding  utf-8   gt   you can write anything for doctype  but basically it s supposed to be manifest  activity  etc  from what I understand

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I deleted the warning in the problems view  It didn t come back till now

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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

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

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