Specifying the number of rows in a table

Hello,

I would like to use W3's tabular data model to record metadata for local
CSV files relevant for statistical analysis using the R language (or
Python, Julia). For example, to indicate that the local file "data.csv"
contains one million rows in randomized order I might use the following
table description:

{
"url": "data.csv",
"notes": [{"numberRows": 1e6, "randomized": true}]
}

A couple questions:

1. Is this reasonable/correct?
2. Is there a better way to do it? Perhaps by linking to a document that
defines new common properties like numberRows?

Thanks,
Clark Fitzgerald