GeoRSSFeatureReader

Categories

Format Specific

Web

Constructs features out of GeoRSS documents/URLs that are stored in a specified attribute of the input features. The features from the GeoRSS document/URL are output with the attributes from the original feature and are merged, if desired.

Usage Notes

  • This transformer works in conjunction with the GeoRSS Reader/Writer. For technical information on the GeoRSS Reader/Writer, choose FME Readers and Writers Reference from the FME Workbench help menu.

Configuration

Output Ports

  • This port will output one feature per GeoRSS document that is read, and which will contain the feed metadata (as per the GeoRSS Reader).

    • One feature will be output for each GeoRSS entry in the GeoRSS document.

    Features whose GeoRSS attribute does not contain valid GeoRSS.

    Parameters

    GeoRSS Attribute

    The attribute to read from.

    GeoRSS Reader Mode

    The GeoRSS reader can be run in two modes:

    • In NORMAL mode, the reader will always return a feature for every feed entry that it processes.
    • In UPDATE mode, the reader will only return entry features if they are new or updated.

    Fail On Invalid GeoRSS

    If this parameter is No, features whose GeoRSS attribute does not contain valid GeoRSS will be output via the InvalidGeorss port.

    Merge Attributes

    The specification of the optional Merge Attributes and associated prefix results in the copying of attributes from the Input feature into the constructed GeoRSS features. If a merge prefix is specified, then the string prefix is added at the start of each attribute from the original feature.

    Additional URL Parameters

    The value of this parameter is only used if the reader is accessing a dataset which is a URL.  The value should be a space-separated list of space-separated name-value pairs.  The name value pairs will be added to the dataset URL.  A value must be provided for each parameter name.  An empty string ( ““ ) can be used to provide an empty parameter value.

    Note: For access outside of your network using a proxy server, use the Network tools in FME Options. From the FME Workbench menu, select Tools > FME Options > Network. For more information, see "Network" in the FME Workbench Help.

    Max Feedstore Entry Age

    Specifies the age in days at which entries will be deleted from a feed’s database. When the reader is run in UPDATE mode, the reader will delete any entries from the database for this feed which are older than the specified value. This ensures the feed database does not become arbitrarily large.  If the value of this directive is not specified, or is 0, no entries will be deleted.

    Feed Database Location

    Specifies the filesystem folder which contains the databases that store information about the feeds that the GeoRSS reader has processed. This parameter is only read from the transformer if the reader is running in UPDATE mode. If no value is set, the FME temp folder will be used.

    Feature Number

    Since a GeoRSS document may contain several features, the transformer allows the sequence of GeoRSS features from a particular GeoRSS document to be numbered.

    Name the attribute to contain this number.

    Feature Identifier

    Furthermore, each GeoRSS feature can also be tagged by a unique sequence number that identifies it as coming from the same GeoRSS document; the optional Feature Identifier parameter can be used to specify the name for this attribute.

    Name the attribute to contain this identifier.

    Editing Transformer Parameters

    Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

    Defining Values

    There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.

    Using the Text Editor

    The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.

    Text Editor

    Using the Arithmetic Editor

    The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.

    Arithmetic Editor

    Conditional Values

    Set values depending on one or more test conditions that either pass or fail.

    Parameter Condition Definition Dialog

    Content

    Expressions and strings can include a number of functions, characters, parameters, and more.

    When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.

    String Functions

    		These functions manipulate and format strings.

    Special Characters

    		 A set of control characters is available in the Text Editor.

    Math Functions

    		Math functions are available in both editors.
    Date/Time Functions Date and time functions are available in the Text Editor.

    Math Operators

    		These operators are available in the Arithmetic Editor.

    FME Feature Functions

    		These return primarily feature-specific values.

    FME Parameters

    		FME and workspace-specific parameters may be used.
    Creating and Modifying User Parameters Create your own editable parameters.

    Dialog Options - Tables

    Transformers with table-style parameters have additional tools for populating and manipulating values.

    Row Reordering

    Enabled once you have clicked on a row item. Choices include:

    • Add a row
    • Remove a row
    • Move current row up one
    • Move current row down one
    • Move current row to top
    • Move current row to bottom

    Cut, Copy, and Paste

    Enabled once you have clicked on a row item. Choices include:

    • Cut a row - delete and copy to clipboard
    • Copy a row to the clipboard
    • Paste a row from the clipboard

    Cut, copy, and paste may be used within a transformer, or between transformers.

    Filter

    		Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output.

    Import

    		Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

    Reset/Refresh

    Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers.

    Note: Not all tools are available in all transformers.

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