Message from the Executive Director

Welcome to the April Member Update. Things are moving ahead on a number of projects and new services. CrossRef Web Services and the Search Partner program are moving forward, as is Multiple Resolution. In addition, the Windows Live Academic Search beta went live (see below for details).

CrossRef held a Webinar in March on Forward Linking that was very successful and we will be holding a CrossRef Usergroup meeting at SSP in June.

CrossRef has been participating in the ISO ISSN revision and a revised draft standard is almost completed and will go out for vote in the next couple of months. I'll provide full details on this when the draft standard is released.

We've been very happy with results from the test Free Text Query service ( username: cr_member password: ref-linking). A number of publishers have used this service and had very positive feedback. This service enables DOI lookup with references formatted in common bibliographic styles - i.e. you can cut and paste a reference list from a PDF file to lookup DOIs.

I'm very happy to announce the launch of the CrossRef Blog - - we will post news items about CrossRef to the list on a regular basis so check out the blog to keep up-to-date. (You can subscribe to the RSS feed -

A top priority for CrossRef continues to be metadata quality - please make sure your technical staff who deal with CrossRef review the Metadata Guidelines (

Finally, I just want to remind members that CrossRef is your organization and your input and participation is crucial to CrossRef's success. Going forward we hope that CrossRef can continue to provide valuable services for members and help publishers improve scholarly communications for end users.

Upcoming Meetings

CrossRef Usergroup Meeting, Tuesday, June 6th, 2:30-5:30pm, Crystal Gateway Marriott, Arlington, VA. Come and get an update on everything that CrossRef is up to and get your questions answered. Registration will be available soon. The usergroup precedes the SSP Annual Meeting, which takes place June 7-9, 2006 at the Crystal Gateway Marriott, more information is available at

2006 Annual Meeting, Wednesday, 1 November 2006, Charles Hotel, Cambridge, MA, USA - Save the Date!

DOIs in Use

DOI Guidelines

Reminder: CrossRef has issued two important documents outlining guidelines for DOI use. The first document ( outlines how to use DOIs in citations and the second ( describes how CrossRef member publishers should use DOIs in their reference export/citation download services.  We encourage all members to update their reference export services to follow these guidelines. 

Multiple Resolution

The two Multiple Resolution Pilots have been very successful. The Institute of Physics has deposited multiple resolution information for one issue of the New Journal of Physics. To see an example go to and click on "References". Go to references 52, 57 and 58 and you'll see the pop up Multiple Resolution box.

GeoScienceWorld is using CrossRef MR to point to different copies of an article hosted on different sites. Rather than have a pop up box, GSW is using an interim page to show the user the available options. For an example go to The interim page can be customized for each journal.

A number of publishers would like to use CrossRef MR in production mode so plans are now being put in place to upgrade MR so it is part of the regular CrossRef data deposit process. CrossRef will soon be releasing Multiple Resolution as a beta service - please contact Ed Pentz ( if you are interested in participating in the beta.

A&Is and Secondary Products Using DOIs

CrossRef has compiled a list of the abstracting and indexing databases and other secondary services that use CrossRef DOIs - the list is available at

CrossRef Web Services and Search Partner Program

CrossRef Web Services (CWS) and the Search Partner Program were announced in December 2005 ( and work has been underway on developing the details of the service. At a Special Board Meeting on April 11th, the board approved the main criteria for organizations to qualify as CrossRef Search Partners (see below) and introductory pricing.

The process going forward will be as follows:

  1. CrossRef will use the Authorized Criteria and Key Terms for Agreement laid out below as the basis for agreements with search engines (terms for other possible users of CWS, such as libraries, will be developed later).
  2. The terms apply to metadata being provided by CrossRef, not to full text materials.
  3. CrossRef will negotiate agreements with potential search partners, so the final agreements with different search partners may vary.
  4. CWS is being offered on an “opt out” basis so each CrossRef member will have the opportunity to review each final negotiated agreement and decide if it does not want to participate on the terms set out in that particular agreement.

Authorized Search Partner Criteria and Key Terms for Agreement - an agreement based on these terms and conditions will be sent to all interested partners who wish to use CWS to enhance their own search services. This is likely to be the GYM services (Google, Yahoo, and Microsoft) as well as more specialized services like Scirus and Infotrieve. The key premises in this document would be reused in forthcoming agreements for libraries and others.

Authorized Search Partner Criteria and Key Terms for Agreement

March 29, 2006 version

  1. To qualify as an Authorized Search Partner, the entity must offer an Internet based search service that:
    1. does not charge end-users for searches;
    2. does not charge for links or referrals from search results to publishers’ sites;
    3. displays the CrossRef DOI as the link to the full text object associated with such DOI, and always, where applicable, displays the DOI as bibliographic metadata;
    4. in search results, designates the CrossRef member-publisher content identified by a DOI as the final "published version" or other mutually agreed upon term before any other versions of the same content listed in the search result; and
    5. applies the Search Partner's ranking algorithm uniformly and without commercial influence.
  2. The Authorized Search Partner acknowledges and agrees that:
    1. the rights granted to it herein to use the CrossRef metadata do not include any rights to crawl or otherwise gain access to publisher content. Rights for access to and use of the full text and/or abstract associated with a particular CrossRef DOI must be acquired directly from the publisher or copyright owner that owns and controls such rights.
    2. it must comply with the copyright laws of the countries in which the relevant services are available.
    3. it may not to use CrossRef metadata to create duplicate journal issue tables of contents with links to alternative versions of the full text articles.
    4. it may not redistribute or repurpose or otherwise make any use of the CrossRef metadata, except as expressly permitted by the terms of this Search Partner Agreement.
    5. it will, upon receipt of written notification from a CrossRef publisher, remove from its services the unauthorized copies of the copyrighted material identified by the publisher.
    6. it will not insert journal titles for display purposes into search result listings that describe and point to content items that are not the final “published version.”
  3. Conditions for Termination [NOTE- - other termination conditions would be included a full agreement]:
    1. In the event that the Authorized Search Partner fails to comply with any of the provisions set forth in section 1 and 2 above, CrossRef may terminate this Agreement by sending a written notice of termination to the Authorized Search Partner. Upon termination, the Authorized Search Partner shall promptly purge all copies of the CrossRef metadata from its system and shall certify in writing to CrossRef that no copies of the metadata remain in its possession, custody or control.
  4. CrossRef member publishers will have:
    1. the choice of whether to participate in metadata delivery to any given Search Partner
    2. the ability to decide which content should be included or excluded from metadata delivery to a Search Partner; provided however that at a minimum metadata regarding author, journal title, article title and date must be included in the metadata delivery.
    3. the ability to terminate participation in metadata delivery to a Search Partner and to have content removed from the Search Partner’s search index within a timely manner (specify reasonable number of business days).
  5. Further Obligations of Authorized Search Partner
    1. The Search Partner acknowledges that it is the mutual intent of the Search Partner and CrossRef that the CrossRef metadata be used to help users locate authoritative versions of content published by CrossRef member-publishers. The Search Partner will therefore use reasonable efforts to promptly implement broadly adopted future industry standards for tagging of exact copies of copyrighted material that enable it to confine indexing of propriety content to official, publisher sources for such content.

Microsoft Live Academic Search

Last week Microsoft issued a press release announcing the launch of Microsoft Live Academic Search - the new service is available at Ten CrossRef member publishers are participating in the beta service and CrossRef is providing metadata and DOIs from these ten publishers (however, Microsoft is indexing the full text directly with the publishers). In addition, CrossRef coordinated setting the standard terms and conditions for publisher participation.

The long term goal is to open participation in the service to all CrossRef member publishers on standard terms and conditions. In the short term, Microsoft will be adding publishers and content in stages based on subject areas. If you are interested in having your content included please email Amy Brand ( The expectation is that Microsoft will beome a Search Partner.

Suggested terms for publisher agreements with search partners. As a service to its members, CrossRef has posted at a document that includes suggested language and terms for publishers entering into agreements with search partners who wish to crawl their full text. This document is based on input from several member publishers working together as a group with CrossRef staff and CrossRef's attorney, and is posted at the direction of the CrossRef Board. The hope is that the more publishers who demand these terms from search partners, the more likely the publishing community is to have their interests reflected in their agreements with search providers. CrossRef Web Services only covers metadata delivered from CrossRef so it is still necessary for member publishers to have agreements with search engine covering access to and use of full text.

Key Statistics

Participating Publishers: 1,632 (
Voting Members: 349 (
Affiliates: 33 (
Agents: 8 (
Library Affiliates: 1,019 (


Jan-Mar 2006

Jan-Mar 2005










Match %




Current Deposits




Backfile Deposits




Total Deposits




Total Records




# DOI Resolutions




# Members




# Depositing prefixes




# Linking prefixes




# Journals




# Book Titles




# Conference Titles




The overall CrossRef statistics show very positive trends except in the case of backfile deposits and the total number of queries. Backfile deposits were expected to fall off since a number of large publishers completed backfile digitizaions in 2005. On the positive side there is a steady increase in the number of current deposits (content published 2004-2006). The overall matching rate increased 63% from 2005 to 2006 and the total number of matches (DOIs returned for linking) was up 52% and this also lead to a substantial increase in the number of DOI resolutions (users clicking on DOIs). Finally, the number of journal titles, conference proceedings titles and particularly book titles all increased from 2005 to 2006.

Deposit and query stats are regularly updated at  

Administrative Issues

First Quarter Invoices - invoices for activity in the first quarter were sent at the beginning of April - please pay promptly. In addition, past due notices were also sent and we ask that if you did receive a past due notice to please pay it promptly.

Business Development Update

New members

During the past two months alone, we have welcomed the following organizations as new CrossRef members: Oceanside Publications Inc., International Food Policy Research Institute, and University of Zagreb - University Computing Centre, World Advertising Research Center (WARC), National Science Teachers Association (NSTA), Indiana University Center for Genomics and Bioinformatics (CGB), DAAAM International, Pacific Northwest Fungi Project, The Commonwealth Fund (CMWF), TASH, American Institute of Aeronautics and Astronautics (AIAA), University of Cadiz Library, Journal of Orthopaedic & Sports Physical Therapy (JOSPT), American Physical Therapy Association (APTA).


CrossRef staff member Anna Tolwinksa recently attended the Simmons College GSLIS Vendor Showcase at their Alumni and Professional Day to meet with current students and talk about what CrossRef does. Some students have elected to write papers on CrossRef as part of their class assignments and have been following up with questions.

End-user survey

CrossRef received over 3,000 (!) responses to its end-user survey on linking and will be circulating a summary of results to the membership shortly. Sneak preview: 36.7% of respondents admitted they know what a DOI is...

CrossRef System

Conflict Reports can now be requested via email. Go to for the links to request reports by title.  

The Missing Metadata Report has been updated and includes the ability to exclude certain data from the missing metadata check to accommodate the fact that some types of content does not always have a complete set of metadata. Reports can be accessed via the depositor report at (follow the little green arrows), just click on the publication titles.

The Title Lock Down has now been completed. This means that only one publisher can deposit DOIs for a particular journal title. If a publisher acquires a journal an ownership transfer must be done before the acquiring publisher can deposit DOIs. If there is a reason that two publishers need to deposit or update DOIs for a journal title (one publisher handling current material and one publisher handling backfile material) then the title lock down can be removed.

DOI News

The April DOI News - - highlights a number of important developments. In collaboration with the Oxford Internet Institute and the e-Horizons Institute the IDF will hold a half day seminar on "Digital objects and the management of information", with a range of international speakers, on June 20, 2006 in Oxford.  In addition there is a link to a D-Lib article by Norman Paskin on ISO interoperability initiatives and the MPEG RDD.


The April NISO Newsline - - provides information on a range of NISO activities. There is a report from the Identifiers Roundtable in March that CrossRef's Chuck Koscher participated in.