Unable to understand how the page number is getting displayed

[Annapurna]

Hi,
I am a beginner with cognos, so please bear with my terminology.
My application is configured to work with cognos. When I run a cognos report through my application, I see that the page number gets displayed in the footer.
When I view this report in the Report Studio, I see that the PageNumber tool is not used to achieve the same. Instead there is a conditional block which refers to a variable named ReportOutput and thats it. ReportOutput has two possible values 'HTML' and 'PDF' and has the following expression -

CASE ReportOutput() WHEN 'HTML' THEN 'HTML' WHEN 'HTMLFragment' THEN 'HTML' WHEN 'PDF' THEN 'PDF' END

But when I view the xml of this report I see the following -

<tableCell>
<contents>
   <conditionalBlocks>
    <conditionalBlockCases refVariable="ReportOutput">
     <conditionalBlock refVariableValue="HTML">
      <contents>
       <textItem>
        <conditionalDataSources refVariable="Locale">
         <conditionalDataSource refVariableValue="English"><staticValue>Page </staticValue></conditionalDataSource>
         {conditionalDataSources for other Locales go here.................. }
          <reportExpression>PageNumber()</reportExpression>
          ....................................


There is a variable called "Locale" which is configured with a few Locales in the report studio.

My question is where is the text item coming from in the contents of ReportOutput conditional datasource when I cant see any textItem being inserted?

Any help would be appreciated.

Thank you,
Annapurna