Category:City

<PageSchema category="City" name="City" pluralName="Cities">

  <semanticforms_Form name="City" pluralName="Citys"/>
  <Template name="City" pluralName="Citys" format="standard">
     <Field name="name" pluralName="names">
        <semanticforms_FormInput>
           <InputType></InputType>
           <Parameter name="size" pluralName="sizes">80</Parameter>
        </semanticforms_FormInput>
        <Label>local Name</Label>
        <semanticmediawiki_Property name="City_name" pluralName="City_names">
           <Type>Text</Type>
        </semanticmediawiki_Property>
     </Field>
     <Field name="webpage" pluralName="webpages">
        <semanticforms_FormInput>
           <InputType></InputType>
           <Parameter name="size" pluralName="sizes">120</Parameter>
        </semanticforms_FormInput>
        <Label>website</Label>
        <semanticmediawiki_Property name="City_webpage" pluralName="City_webpages">
           <Type>URL</Type>
        </semanticmediawiki_Property>
     </Field>
     <Field name="Population" pluralName="Populations">
        <semanticforms_FormInput>
           <InputType></InputType>
           <Parameter name="size" pluralName="sizes">20</Parameter>
           <Parameter name="mandatory" pluralName="mandatorys"></Parameter>
        </semanticforms_FormInput>
        <Label>Pop.</Label>
        <semanticmediawiki_Property name="City_Population" pluralName="City_Populations">
           <Type>Number</Type>
        </semanticmediawiki_Property>
     </Field>
     <Field name="wikipedia_url" pluralName="wikipedia_urls">
        <semanticforms_FormInput>
           <InputType></InputType>
           <Parameter name="size" pluralName="sizes">100</Parameter>
           <Parameter name="mandatory" pluralName="mandatorys"></Parameter>
        </semanticforms_FormInput>
        <Label>wikipedia url</Label>
        <semanticmediawiki_Property name="City_wikipedia_url" pluralName="City_wikipedia_urls">
           <Type>URL</Type>
        </semanticmediawiki_Property>
     </Field>
     <Field category="Country" name="Country" pluralName="Countrys">
        <semanticforms_FormInput>
           <InputType>combobox</InputType>
           <Parameter name="size" pluralName="sizes">50</Parameter>
           <Parameter name="autocomplete on category" pluralName="autocomplete on categorys">Country</Parameter>
           <Parameter name="mandatory" pluralName="mandatorys"></Parameter>
        </semanticforms_FormInput>
        <Label>Country</Label>
        <semanticmediawiki_Property name="City_Country" pluralName="City_Countrys">
           <Type>Page</Type>
        </semanticmediawiki_Property>
     </Field>
     <Field category="Mayor" name="Mayor" pluralName="Mayors">
        <semanticforms_FormInput>
           <InputType>combobox</InputType>
           <Parameter name="size" pluralName="sizes">80</Parameter>
           <Parameter name="autocomplete on category" pluralName="autocomplete on categorys">Mayor</Parameter>
        </semanticforms_FormInput>
        <Label>Mayor</Label>
        <semanticmediawiki_Property name="City_Mayor" pluralName="City_Mayors">
           <Type>Page</Type>
        </semanticmediawiki_Property>
     </Field>
  </Template>

</PageSchema> This Category has been generated with JSMW_PageSchema Version 0.0.2 at 2015-01-09T18:46:57Z
The following results are based on it:

• Category:City
  
• Template:City
  
• Form:City
  

see Semantic Page Schemas sample xml structure
Systematic information on cities (called settlments there) is available on wikipedia

Example for New York:

{{Infobox settlement
| name                    = New York City
| official_name           = City of New York
| settlement_type         = [[City (New York)|City]]
| image_skyline           = NYC Montage 2014 4 - Jleon.jpg
| image_flag              = Flag of New York City.svg
...| population_total        = 8,405,837
| website                 = [http://www.nyc.gov/ New York City]
}}

• see also Category:Country
• see also Category:Mayor

UML diagram for City PageSchema