= LEHD Public Use CSV Naming Schema v4.0 - CSV Naming Convention
12 November 2014

( link:lehd_csv_naming.pdf[Printable version] )

Purpose
-------
The public-use data from the Longitudinal Employer-Household Dynamics Program, including the Quarterly Workforce Indicators (QWI)
and Job-to-Job Flows (J2J), are available for download with the following data schema. 
These data are available as Comma-Separated Value (CSV) files through the LEHD website’s Data page at 
http://lehd.ces.census.gov/data/ and through LED Extraction Tool at http://ledextract.ces.census.gov/. 

This document describes the file naming schema for LEHD-provided CSV files. The contents (schema) are described in  link:lehd_public_use_schema.html[].

[IMPORTANT]
.Important
==============================================
This document is not an official Census Bureau publication. It is compiled from publicly accessible information
by Lars Vilhuber (http://www.ilr.cornell.edu/ldi/[Labor Dynamics Institute, Cornell University]).
Feedback is welcome. Please write us at 
link:mailto:lars.vilhuber@cornell.edu?subject=LEHD_Schema_v4[lars.vilhuber@cornell.edu].
==============================================


Basic Schema
------------

All files are preceded by a file type definition, followed by additional information on the aggregation level of the file, or 
some other identifier.

-------------------
[TYPE]_[DETAILS].csv
-------------------

=== QWIPU from the LED Extraction Tool
CSV files downloaded through the  LED Extraction Tool at http://ledextract.ces.census.gov/ follow the following naming convention:
------------------------------------
[type]_[id].csv
------------------------------------
where +[id]+ is the Request ID (a unique string of characters) generated every time Submit Request'' is clicked. The ID references each query submission made to the database.

=== Other files
Full CSV files downloaded from the LEHD website at http://lehd.ces.census.gov/data follow the following naming convention:
--------------------------------
[type]_[geohi]_[demo]_[fas]_[geocat]_[indcat]_[ownercat]_[sa]
--------------------------------
where each component is described in more detail below. Schema files detailing legal values for each component can be downloaded from this website. 



== Description of Filename Components

=== Types

( link:naming_type.csv[] )

[width="90%",format="csv",delim=";",cols="^1,<3,<5,<3",options="header"]
|===================================================
include::naming_type.csv[]
|===================================================

=== fipsalpha 
( link:naming_fipsalpha.csv[] )

This component is the alphabetic FIPS state code equivalent to the numeric FIPS code in link:label_fipsnum.csv[], based on FIPS PUB 5-2.

[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
type,Description
st,Any legal 2-character state postal code (see link:naming_fipsalpha.csv[] ))
|===================================================

=== demo 
( link:naming_demo.csv[] )



[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
include::naming_demo.csv[]
|===================================================

=== fas 
( link:naming_fas.csv[] )



[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
include::naming_fas.csv[]
|===================================================

=== geocat 
( link:naming_geocat.csv[] )



[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
include::naming_geocat.csv[]
|===================================================

=== indcat 
( link:naming_indcat.csv[] )



[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
include::naming_indcat.csv[]
|===================================================

=== owncat 
( link:naming_owncat.csv[] )



[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
include::naming_owncat.csv[]
|===================================================

=== sa 
( link:naming_sa.csv[] )



[width="60%",format="csv",cols="^1,<4",options="header"]
|===================================================
include::naming_sa.csv[]
|===================================================



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