DIH; Hardcode field value/replacement based on source column

[Wesley Small]

I am trying to find a clean way to *hardcode* a field/column to a specific
value during the DIH process.  It does seems to be possible but I am getting
an slightly invalid constant value in my index.

<field column="content_type_s" sourceColName="title_t" regex="(.*)"
replaceWith="Video" />

However, the value in the index was set to "VideoVideo" for all documents.

Any idea why this DIH instruction would see constant value appear twice??

Thanks,
Wesley.