Workbook
The complete file, such as .xlsx, .xls or .ods.
File formats & data
A spreadsheet file can contain more than one table.
An Excel or OpenDocument file is a workbook. Inside it are worksheets, and a worksheet can contain the rows and columns you actually want to use.
Key concepts
Worksheet
One tab or sheet inside the workbook. A workbook may contain one or many worksheets.
Table
For TaskThimble, the useful table is the selected rows and columns represented as a canonical TABLE object for compatible tools.
Why choose a sheet?
If several worksheets exist, TaskThimble cannot know which one carries the business meaning you intend. Explicit choice prevents a confident but wrong conversion.
What TaskThimble preserves — and what it does not claim
TaskThimble reads displayed cell data for table tasks and leaves your source workbook unchanged. A table handoff is not a promise to preserve workbook layout, macros, charts, formulas as formulas or every spreadsheet feature.