| Current Members Log-In |  View Your Shopping Cart

Home
Data Products
Publications
Fundamentals
CRB Indexes
B2B Products

CRB Home Page
CRB DataCenter
Final Markets
More ...
CRB PriceCharts
CRB Encyclopedia of Commodity and Financial Charts
CRB Commodity Yearbook
More ...
Crop Production Calendar Maps
Weekly Precipitation Maps (NOAA)
More ...
Index Quotes and Charts
Daily Closing Values
More ...
Publications
Data Products
More ...


 
- CRB PowerSystem™ Software

META Format Description (Computrac (MetaStock))

The META format is a binary file format. As such, data in a META file cannot be read with a standard word processor. CRB provides PowerPro for viewing and editing these files. Only edit META data files with such an editor.

The META format has three structural levels:

  1. The top level is a MASTER file which lists the names, trading symbols and miscellaneous information about securities data files of the directory in which it is located. There is a limit of 255 security files per directory in the original Computrac form.
  2. The second level is the "Fn.dop" file which gives the data fields and scale factors for each data file.
  3. The third level is the "Fn.dat" file which contains a time series of prices for each security.

    The 'n' in each file name is an integer from 1 to 255. Thus, the files in a directory appear as: F1.dop & F1.dat and so on. (i.e. F1.dop, F1.dat, ... F255.dop, F255.dat)


META File Structure:
Futures, Options, Commitments of Traders, Volatility, U.S. Equities (unadjusted*) and Mutual Funds

Futures and Options

Type Filename Default Location
Futures Fn.DOP / Fn.DAT C:\Program Files\CRB\Data\META\Futures\SP\
(formerly C:\CRB\MASTER)
Options Fn.DOP / Fn.DAT C:\Program Files\CRB\Data\META\Options\SP\SP2005M\
(formerly C:\CRB\Strikmaster\SP\)

Commitments of Traders

Type Filename Default Location
Commitments of Traders Fn.DOP / Fn.DAT C:\Program Files\CRB\Data\META\COT\SP\
(formerly Not Available)

Volatility

Type Filename Default Location
Volatility Fn.DOP / Fn.DAT C:\Program Files\CRB\Data\META\Volatility\SP\
(formerly Not Available)

U.S. Equities (unadjusted*)

Type Filename Default Location
Equities (unadjusted*) Fn.DOP / Fn.DAT C:\Program Files\CRB\Data\META\Equities\IB\
(formerly C:\CRB\Stockmaster)
*Set PowerDist to output unadjusted Equities data.

Mutual Funds

Type Filename Default Location
Mutual Funds Fn.DOP / Fn.DAT C:\Program Files\CRB\Data\META\Funds\FG\
(formerly C:\CRB\Fundmaster)


The MASTER File

The MASTER file in each directory has one record per security. Each record gives the file number "Fn" for the security along with its text name, trading symbol, time base and update information. This file is organized a 53 bytes in a fixed length field format. The fields may be ASCII characters, binary integers or floating point number in an old Microsoft Basic Floating point format (MBF). It is necessary to convert these floating point number into the current IEEE floating point format used in contemporary computers.

The "Fn.dop" File

The ".dop" file is an ASCII file with variable length text records. It is purpose is to allow the user to customize the data fields for any security and specify input/output precision for each field.

Each ".dop" record specifies one field of the ".dat" file. Each record ends in <CR><LF>.

For example this "F1.dop" file:

Type Layout
Futures
(ccyyyym, ccNFVOI, cc----Y)
"DATE",0,0<CR><LF>
"OPEN",2,2<CR><LF>
"HIGH",2,2<CR><LF>
"LOW",2,2<CR><LF>
"CLOSE",2,2<CR><LF>
"VOLUME",0,0<CR><LF>
"OPEN INTEREST",2,2<CR><LF>
Commitments of Traders
(cc----C)
"DATE",0,0<CR><LF>
"COMMERCIAL",0,0<CR><LF>
"NON-COMMERCIAL",0,0<CR><LF>
"NON-REPORTABLE",0,0<CR><LF>
Options
Short name: (ccsssmyy, ccssssmy)
Long name: (ccyyyymssss, ccyyyymsssss)
"DATE",0,0<CR><LF>
"OPEN",2,2<CR><LF>
"HIGH",2,2<CR><LF>
"LOW",2,2<CR><LF>
"CLOSE",2,2<CR><LF>
"VOLUME",0,0<CR><LF>
"OPEN INTEREST",2,2<CR><LF>
Volatility
(ssyyyym)
"DATE",0,0<CR><LF>
"IMPLIED",2,2<CR><LF>
"HISTORICAL",2,2<CR><LF>
U.S. Equities
(ss)
"DATE",0,0<CR><LF>
"OPEN",2,2<CR><LF>
"HIGH",2,2<CR><LF>
"LOW",2,2<CR><LF>
"CLOSE",2,2<CR><LF>
"VOLUME",0,0<CR><LF>
Mutual Funds
(ssssX)
"DATE",0,0<CR><LF>
"OPEN",2,2<CR><LF>
"HIGH",2,2<CR><LF>
"LOW",2,2<CR><LF>
"CLOSE",2,2<CR><LF>

Note that the ASCII entries are delimited by double quotes, there is no comma after the second zero and each record ends with ASCII d:\web\WWWCRB~1.COM\www\support\POWERS~1\FORMAT~2.ASPD and d:\web\WWWCRB~1.COM\www\support\POWERS~1\FORMAT~2.ASPA (<CR><LF>). The first ASCII number is the number of decimal places or fraction format displayed on screen. The second ASCII number is the number of decimal places or fraction expected upon user editing input. Example: "HIGH",2,3<CR><LF> would specify two decimals (XX.XX) when the data is displayed and three (XX.XXX) when the data is input.

The "Fn.dat" File

The file holding the security price series has a name "Fn.dat" with "Fn" incommon between the .dat and .dop files. The actual security name, symbol, date range and number of fields per record appears in the MASTER file. Each data file record contains (at most) fields for the date, and the price open, high, low, close, volume, and open interest. Computrac supports from 4 to 7 fields per record. Date is required. The most common arrangement is five fields: date, high, low, close, volume. The next most common, especially for commodities, is seven field: date, open, high, low, close, volume, open interest.

Previous


Click Help on the Main menu bar for additional assistance. If you have any questions,
please call +1.800.621.5271 or +1.312.554.8456 or email: info@crbtrader.com

Quotes & Charts | About CRB | Contact CRB | Support Pages | Sitemap
Copyright © 1934 - 2017 by Commodity Research Bureau - CRB. All Rights Reserved.
Market data provided by ddf and subject to user agreement and privacy policy.
209 W. Jackson Blvd. • Suite 200 • Chicago, Illinois 60606-6940 • USA
Phone: 800.621.5271 or 312.554.8456 • Fax: 312.939.4135 • Email: info@crbtrader.com
Press Ctrl+D to bookmark this page - Set http://www.crbtrader.com as your Home Page