Reader Directives

The suffixes shown are prefixed by the current <ReaderKeyword> in a mapping file. By default, the <ReaderKeyword> for the R reader is RDATA.

DATASET

This is the name of a single R file. The default extension for R files is .rda.

Required/Optional

Required

Mapping File Syntax

RDATA_DATASET /usr/data/rdata/input.rda

Workbench Parameter

Source .rda file

SRC_ENCODING

An R dataset may contain encoding information in its header, or the encoding may be user-specified.

Required/Optional

Optional

Supported Attribute Types

The following table shows the attribute types supported.

Field Type

Description

string(<width>)

String 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.

number(<width>,<decimals>)

Number fields store single and double precision floating point values.

The width parameter is the total number of characters allocated to the field, including the decimal point. The decimals parameter controls the precision of the data and is the number of digits to the right of the decimal.

date

Date fields store date as character string with the format YYYYMMDD.

datetime

Datetime fields store datetime as character string with the format YYYYMMDDHHMMSS.

time

Time fields store time as character string with the format HHMMSS.

SEARCH_ENVELOPE

Using the minimum and maximum x and y parameters, define a bounding box that will be used to filter the input features. Only features that interact with the bounding box are returned.

If all four coordinates of the search envelope are specified as 0, the search envelope will be disabled.

Mapping File Syntax

<ReaderKeyword>_SEARCH_ENVELOPE <minX> <minY> <maxX> <maxY>

Note: If all four coordinates of the search envelope are specified as zero, the search envelope will be disabled.

Required/Optional

Optional

Workbench Parameter

Minimum X, Minimum Y, Maximum X, Maximum Y

SEARCH_ENVELOPE_COORDINATE_SYSTEM

This directive specifies the coordinate system of the search envelope if it is different than the coordinate system of the data.

The COORDINATE_SYSTEM directive, which specifies the coordinate system associated with the data to be read, must always be set if the SEARCH_ENVELOPE_COORDINATE_SYSTEM directive is set.

If this directive is set, the minimum and maximum points of the search envelope are reprojected from the SEARCH_ENVELOPE_COORDINATE_SYSTEM to the reader COORDINATE_SYSTEM prior to applying the envelope.

Required/Optional

Optional

Mapping File Syntax

<ReaderKeyword>_SEARCH_ENVELOPE_COORDINATE_SYSTEM <coordinate system>

Workbench Parameter

Search Envelope Coordinate System

CLIP_TO_ENVELOPE

This directive specifies whether or not FME should clip features to the envelope specified in the SEARCH_ENVELOPE directive.

Values

YES | NO (default)

Mapping File Syntax

<ReaderKeyword>_CLIP_TO_ENVELOPE [yes | no]

Workbench Parameter

Clip To Envelope

EXPOSED_ATTRS

This directive allows the selection of format attributes to be explicitly added to the reader feature type.

This is similar to exposing format attributes on a reader feature type once it has been generated; however, it is even more powerful because it enables schema-driven applications other than Workbench to access and leverage these attributes as if they were explicitly on the schema as user attributes.

The result of picking a list of attributes is a comma-separated list of attribute names and types that will be added to the schema features. Currently all reader feature types will receive the same set of additional schema attributes for a given instance of the reader.

Required/Optional

Optional

Mapping File Syntax

Not applicable.

While it is possible for FME Objects applications to invoke this directive, the required format is not documented.

This directive is intended for use in our GUI applications (for example, Workbench) only.

Workbench Parameter

Additional Attributes to Expose

ENCODING

This specifies the file encoding to use when reading.

Required/Optional

Optional

Values

<encoding>

Workbench Parameter

Character Encoding

Encodings

BIG5

CP936

CP950
IBM866
CP932
SHIFT_JIS
ISO-8859-1
ISO-8859-2
ISO-8859-3
ISO-8859-4
ISO-8859-15
ISO-8859-6
ISO-8859-5
ISO-8859-7
ISO-8859-8
ISO-8859-9
UTF-8
UTF-16
UTF-16BE
UTF-16LE
UTF-32
UTF-32BE
UTF-32LE
WINDOWS-1256
WINDOWS-1257
WINDOWS-1251
WINDOWS-1253
WINDOWS-1255
WINDOWS-1252
WINDOWS-1250
WINDOWS-1258
CP949
EUC-CN
EUC-JP