About Data Extraction
You can extract information from objects, such as block attributes and drawing properties,
to create a schedule, a parts list, or a bill of materials.
For example, if you have a residential construction project and you need to create
a door installation schedule to place in the drawing. Using the Data Extraction wizard,
you can select only those objects that are doors (blocks in this case), and extract
the attribute data. Because the Data Extraction wizard also extracts property information
from objects, you have more flexibility.
After you select the properties of the doors, the extracted data is displayed in
the wizard in columns. You can organize and refine the information in these columns,
and format it by specifying a table style or using an existing table as a template.
When youâ€™re satisfied with how the table looks, the extraction is complete when you
insert the table into the drawing. If you need to share the extracted information
with others on the project, you can output the same extracted data to an external
Information stored in an Excel spreadsheet can be linked and combined with the extracted drawing data (object property data). Continuing with the example above; you have some additional
information about the doors in the your drawing in an Excel spreadsheet (supplier
and cost). You select the columns for supplier and cost in the spreadsheet and combine
them with the other data in the data extraction.
The columns in the Excel spreadsheet will be added to the columns on the Refine Data
page in the Data Extraction wizard.
All the columns except for Cost were added to the extracted data columns. Excel columns
are designated with a symbol in the column label.
The table inserted in the drawing contains columns from both the extracted data and
from the Excel spreadsheet.
When a drawing from which property data was extracted has changed, you can be notified
that the data extraction table is no longer current. For example, if some doors in
the drawing were resized or removed, you can choose to be notified that the data extraction
table needs to be updated. Notification is especially useful during critical times
when itâ€™s important to know if the data is not current in the table, such as when
plotting or publishing.
Starting a Data Extraction
When you create a new data extraction, you are prompted to save all the specific details
about the extraction to a data extraction (DXE) file. The DXE file stores drawing
and folder selections, object and property selections, and formatting choices.
You can use a data extraction file as a template to perform the same type of extraction
at any time. If you need to extract the same type of information repeatedly, using
a DXE file is time-saving and convenient.
You can also edit an existing data extraction to add or remove drawings, add or remove
objects, or select different properties from which to extract data. Tables that reference
the same DXE file, even if those tables are in other drawings, will display the changes
when those tables are updated.
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