This example shows how to extract Power Query query definitions from an embedded Power BI tabular model by reading the model’s in-memory connection string. The PowerShell script first locates the dynamic port number for the local Analysis Services instance by scanning workspace files for `msmdsrv.port.txt`. It then uses the `Invoke-ASCmd` cmdlet to query the `$SYSTEM.TMSCHEMA_DATA_SOURCES` schema, revealing the connection string. The script decodes the base64-encoded `Mashup` portion of that string, writes it to a binary ZIP archive, and uses `System.IO.Compression.ZipFile` to extract `Section1.m`, which contains the readable Power Query formulas. This approach exposes the model’s underlying data-transformation logic without any direct UI interaction.