Data Distribution

From GCD
Jump to navigation Jump to search

What is the Data Distribution policy?

The GCD strives to make its data as available as possible. Along with the website, we also make the raw data that makes up the credits in the GCD available on a semi-regular basis.

GCD Data - The GCD is an original compilation and database which by reason of the selection and arrangement of its contents constitutes an intellectual creation as defined by Copyright Law, and is protected as such. The selection and arrangement of data of each contribution, as well as any original research or writing contained in the contribution, is copyrighted jointly by those who did the original work and the GCD. The data can be used according to our Data License. Dumps of the database are available at - if you currently do not have an account with us you will be asked to register first.

What is the format?

Please see the Current Schema page for some outdated information on the schema. It is distributed as a compressed MySQL dump. Some overview ERD schemas can be found under Main_Page#Technical_Details.

How do I get it?

You can download it directly from - if you currently do not have an account with us you will be asked to register first. Visit to join the technical discussion list.

Historical snapshots of the database are archived twice per year at the Library of Congress.

How often is it updated?

The live data on the website is updated constantly. The full data dump is generated on a bi-weekly basis, in formats including but not necessarily limited to a direct database dump of the public tables and fields. See also our Data Distribution Policy.

How should I credit the GCD? What rights does the GCD retain? What rights do I have?

The dumps are licensed under the Creative Commons Attribution 3.0 Unported license, just as the web site is.

Provisional guidance (to be updated): if you use our data on a web page, you must credit the "Grand Comics Database™" by name somewhere on that page in a way that clearly associates it with the data, and you must provide a link back to the site. Usually by making "Grand Comics Database™" a link. If the page reflects an object from our database (such as an issue or a series), you should link to the page for that object rather than to our front page. You must also state and provide a link to the license. The GCD Board reserves the right to update and refine this policy. Contact the Board through the GCD Contact address, [email protected] for clarifications or guidance on cases that do not fit this description clearly.

Can I get all the covers?

No. We don't claim any copyright on the covers or the scans. All cover images are copyrighted by their respective current copyright holders. Copyrights are typically held by the publisher on work-for-hire properties, by the creator(s) on creator-owned properties, or by a third party in the case of licensed properties. Copyright details at the time of publication can usually be determined from the indicia of comics, but may have changed since that time. The GCD does not track changes in copyright. Due to legal concerns, we do not distribute the cover images or otherwise make them available except as seen in our pages which we can due to Fair-Use rules of copyright.

Also, please note that you cannot link directly to the covers. As this "leaches" bandwidth from our site only placeholder images will appear if you do so. Everyone knows that nobody can stop you if you click on each cover you want and save it to your computer for later reuse. An acknowledgment of the fact that they came from the GCD would be nice.

Can I get just part of the data?

Yes. If you are logged in, on any issue display page there is a small download icon in the upper right corner of the "Editing" box. This will download the data for just that issue. The data will be a ".gcd" file type, which is tab delimited text. The file will open in Microsoft Excel and some other spreadsheets, and in Notepad. The text file is in our flatfile format described in Indexing Offline.

If you open in a spreadsheet you might have to (or can) select a charset (it should be Unicode(UTF-8) or something similarly called) and a country/language (it should be English or something similar). The latter is needed for the correct processing of page counts by the used spreadsheet program. Since we use English formatting in the page count a point is the decimal mark, but some spreadsheets might interpret these as the thousand separator depending on their setttings.