Microsoft Excel (XLSXR) Reader Parameters

Different feature types are read by default, depending on whether you make changes to the Reader Parameters (accessible from the Add Reader > Parameters button):

By default, all worksheets and named ranges are selected. You can use the Select button to filter the display:

Screenshot of Select button and menu options: Sheets, Named Ranges, All, None

  • When you open the Reader Parameters, by default, all of the worksheets in the spreadsheet will be selected, and all named ranges will be deselected. This is so that all cell data is read into FME only once.
  • If you add a reader without opening the Reader Parameters dialog, and there is more than one feature type, you will have to select the feature types to add.

Sheets to Read

This area shows all of the worksheets and named ranges in the Excel file. A named range is of the form sheetName/NamedRangeName.

Note: Tables are treated the same as named ranges, and will appear with the same form.

Example

In this example, the selected area is a named range: the name of the named range is Address, and it is on the sheet PublicTrees.

The column Field Names Row allows you to select which row contains the header names, and the column Cell Range allows you to restrict the information to read. If a cell in the Field Names Row is blank (if, for example, it is a merged cell), it will automatically be given the merged cell value.

Note: When using merged reader feature types (dynamic workflow), the reader will use the Field Names Row and Cell Range parameters of the first selected Sheet or Named Range for all other feature types, regardless of what is set in this table. Individual settings are only supported on individual feature types (static workflow). For alternative approaches to reading in dynamic workflows, see the Troubleshooting section.

The Select menu allows you to choose which worksheets/named ranges to read. By default, FME will select All.

If the column Field Names Row value is set to zero (0), then the column names will be set to the Excel column letters A, B, C, etc. This can be useful if there are no field names, or if they are not consistent. The Excel Reader only supports a single row of field names, and merged cells in the field name row will result in the value being duplicated for all columns it covers. To resolve attribute name duplication, additional numerals will be appended.

Preview

This area shows a preview of the data (up to 100 rows) of the selected feature type (either feature or named range). As shown in the example here, if you select a header row from the Sheets to Read area, that row will be shown in boldface text.

Attributes

This area displays the attributes that were created for the feature type (schema scanned).

  • Exposed: Selected attributes will be added to the reader feature type. Unchecked attributes will not be added.
  • Name: The attribute name that will be placed on resulting features.
  • Type: The attribute type is listed in this column. You can change the attribute type by clicking on the field and selecting from the drop-down list. This only affects the resulting features if the selected attribute type is a coordinate type or a date type.
  • Width: This value is ignored for attributes produced from this reader.
  • Precision: This value is ignored for attributes produced from this reader.

Field Type

Description

boolean

Boolean fields store True/False data. Data read or written from and to such fields must always have a value of either true or false.

FME represents Booleans as Yes and No for True and False, respectively, so any logging within FME will reflect this. Round-tripped values will be written as True/False as expected.

char(<width>)

Character fields store fixed-length strings. The width parameter controls the maximum number of characters that can be stored by the field. No padding is required for strings shorter than this width.

Notes:

Strings encountered that have length greater than width will still be returned; they will not be truncated.

The width parameter is only valuable if the features will be passed to another format that requires this information.

datetime

Datetime fields convert doubles or strings in Excel to FME datetime string format and are detected using the formatting value and cell value from the source file. Note that no formatting is preserved from the original value in Excel.

YYYYMMDDHHmmSS.mmm

(Year, Month, Day, Hour, Minute, Second, Milliseconds)

date

Date fields convert doubles or strings in Excel to FME date string format, and are detected using the formatting value and cell value from the source file. Note that no formatting is preserved from the original value in Excel.

YYYYMMD

(Year, Month, Day)

time

Time fields convert doubles or strings in Excel to FME time string format, and are detected using the formatting value and cell value from the source file. Note that no formatting is preserved from the original value in Excel.

HHmmSS.mmm

(Hour, Minute, Second, Milliseconds)

string

String fields store variable length character data up to a length of 32767 characters. Values larger than 32767 are truncated.

number

Number fields store single and double precision floating point values.

x_coordinate

y_coordinate

z_coordinate

Coordinate fields store double precision floating point values. There is no ability to specify the precision and width of the field.

If x and y coordinates are specified on a feature type on read, features will use them to try to create point geometries.

The attributes are not consumed by the geometry, so they will still appear on the features produced.

If your spreadsheet data contains X/Y values or Latitude/Longitude, FME automatically converts the rows to geometry.

FME also recognizes common labels for columns, like latitude and longitude, and sets the source coordinate system to LL-WGS84.

Filter

Filter a list of attributes by typing a key sequence into this field. For more information, see Usage Notes.

Read Formulas (.formula)

If this parameter is selected, an attribute will be added to the workspace for columns that contain a formula. The reader reads formulas used to calculate the values of a cell and stores the formula in the attribute <attributeName>.formula.

Read Hyperlinks (.hyperlink)

If this parameter is selected, an <attributeName>.hyperlink attribute will be added to the workspace for columns that contain a hyperlink.

Read Formatting (.formatting)

If this parameter is selected, an <attributeName>.formatting attribute will be added to the workspace for columns that contain formatting.

Apply Filter(s)

By default, the Excel Reader ignores all Excel filters and reads every row of data. Select this parameter if you only want to read in the rows that are not being filtered out. This parameter sets the feature-type level default.

Maximum Rows to Scan

If the field structure of the first several rows of a feature type is representative of the remainder of the feature type, this option can be set to prevent FME from unnecessarily reading further rows from a potentially large range when determining its schema.

If left blank, there will be no limit and all rows will be read.

Note: This setting only applies to the schema generation; it does not limit the number of rows read when the translation is run.

Trim Whitespace from Attribute Names

If checked, the reader will trim all whitespace characters from the ends of all attribute names. For example, “ Category ” would become “Category”.

Trim Characters from Attribute Names

This parameter accepts a list of ASCII characters which it will trim from the ends of all attribute names. (This is similar to setting the AttributeTrimmer transformer Trim Type parameter to Both.)

For example, when entering "_ in the parameter field, the attribute ""___Category_"" becomes Category. It's also a useful option for removing quotation marks from column names ("region" becomes region).

Read Blank Cells As

This parameter defines how FME will read back blank cells.

  • Null – Blank cells will be read back as null attributes on the output feature.
  • Missing – Blank cells will be read back as missing attributes on the output feature.

Expand Merged Cells

This parameter tells the reader what to do when it encounters a merged cell range.

  • If selected (which is the default), the value will be placed into every attribute contained within the merged cell.
  • If not selected, the value of the range will only be placed in the first attribute of the first attribute containing it.

For example, if there is a merged cell range of A1:B2 (which contains 4 cells) and it has the value testString:

  • If you select Expand Merged Cells, you receive two features with attributes A=’testString’ and B=’testString’.
  • If you do not select Expand Merged Cells, you receive one feature with attributes A=’testString’ and B=<missing> and one feature with A=<missing> and B=<missing>.

Read Embedded Images As

Sets how any images embedded in the worksheets will be handled. An image’s top left corner determines the cell the image is considered to be placed in. Images may be ignored on read, read as an additional value for that attribute (<attributeName>.raster_data), or as additional geometry features. If images are considered to be part of the row’s data, use the Attributes option. The Geometry option is useful if images on a worksheet are related to the dataset but not tied to any particular row.

  • None – No images will be read. This is the default option.
  • Attributes – If a row within the selected columns contains an image, the cell’s value will be read as normal, and additional attributes will be added that pertain to the image. Images that fall outside the Cell Range for the feature type will never be read.
    • .raster_data – Blob (binary-encoded string) containing the raw image file contents. Can be converted to a raster geometry via the RasterReplacer transformer.
    • .raster_format – The image format of the blob (PNG, GIF, JPEG, TIFF). Less common formats supported by Excel (WMF, EMF, DIB) may not be supported as attributes and will generate a warning.
    • .raster_height – The image’s displayed height in pixels.
    • .raster_width – The image’s displayed width in pixels.
  • Geometry – Images in BMP, PNG, GIF, JPEG, and TIFF formats will be read as Raster features. Less common formats supported by Excel (WMF, EMF, DIB) may not be supported as geometries and will generate a warning. When reading embedded images as Geometry, all images on the sheet will be read as features, even if they fall outside the feature type read area.

It is possible to link images to an Excel worksheet without inserting the image into the workbook. These Linked Images cannot be read directly by FME and will generate a warning when one is encountered. When encountered in Attributes mode, in lieu of the attributes listed above, only .raster_location will be set to the file path where the image can be found. Note that the path is not guaranteed to be valid. In Geometry mode, the xlsx_raster_location format attribute will be set instead of a raster geometry.

Feature Types corresponding to Named Ranges will never produce features for images.

Use this parameter to expose Format Attributes in Workbench when you create a workspace:

  • In a dynamic scenario, it means these attributes can be passed to the output dataset at runtime.
  • In a non-dynamic scenario, this parameter allows you to expose additional attributes on multiple feature types. Click the browse button to view the available format attributes (which are different for each format) for the reader.