Reader Directives

The suffixes listed are prefixed by the current <ReaderKeyword> in a mapping file. By default, the <ReaderKeyword> for the GeoPackage reader is GEOPACKAGE.

DATASET

The value for this directive is the path to the file to be read.

Required/Optional

Required

DEF

The syntax of the definition is:

GEOPACKAGE_DEF <tableName>	                                   \
	geopackage_type <wkb_type>                                 \
	[<fieldName> <fieldType>[,<indexType>]] +

The <tableName> must match the name of an existing GeoPackage table in the database. This will be used as the feature type of all the features read from the table.

The <fieldType> of each field must be given, but it is not verified against the database definition for the field. In effect, it is ignored.

Required/Optional

Required

IDs

Required/Optional: Optional

This optional specification is used to limit the available and defined database tables that will be read. If no IDs are specified, then all tables are read. The syntax of the IDs keyword is:

GEOPACKAGE_IDs <featureType1> \
 	<featureType2> … \
 	<featureTypeN> 

The feature types must match those used in DEF lines.

The example below selects only the history table for input during a translation:

GEOPACKAGE_IDs history

Required/Optional

Required

RETRIEVE_ALL_SCHEMAS

This parameter is applicable only when generating a mapping file, generating a workspace, or when retrieving schemas in an FME Objects application.

When set to yes, schemas for all of the tables and feature classes in the database are returned.

When set to no (or missing), and if RETRIEVE_ALL_TABLE_NAMES is similarly set to no (or missing), only schemas requested by the IDs parameter are returned.

Required/Optional

Optional

Values

YES | NO (default)

NO: The reader will return the schemas for the feature types specified in the IDs. If no features are specified in IDs, then FME returns the schema features for all the tables.

If this value is not specified, then it is assumed to be No.

YES: Indicates to the reader to return all the schemas of the tables in the database.

Mapping File Syntax

Not applicable.

FME Objects applications would include RETRIEVE_ALL_SCHEMAS followed by “YES” in the parameters array passed to IFMEUniversalReader::open().

Workbench Parameter

Not applicable

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>

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

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