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LinkOut Help [Internet]. Bethesda (MD): National Center for Biotechnology Information (US); 2006-.

Bookshelf ID: NBK3812

Information for Full-Text Providers

Created: July 18, 2005; Last Update: February 13, 2012.

LinkOut is a service of NCBI that allows third parties to link specific NCBI database records to relevant web-accessible resources.  Typically, publishers and other full-text providers use LinkOut to provide links from PubMed records to their online full-text journals.

An FAQ for Link Providers is available.

How It Works

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LinkOut provides links from PubMed and other NCBI database records to online resources external to the NCBI system. All linking information is submitted by LinkOut providers - the owner or agent for the owner of the online resource. LinkOut providers are responsible for maintaining their links.

To submit links to your resource, you will need to upload two XML files, an identity file and a resource file. The identity file contains the information about your organization needed to list your resource(s) in LinkOut. The resource file describes the PubMed records you will link from and contains the information that LinkOut needs to generate the links.

All links can be viewed in the LinkOut Display. In PubMed, links can also be viewed as icons.

If your organization has a subscriber base for online full text, the links that you submit may also be used as the basis for library links. LinkOut allows libraries to display their own icon on PubMed records available through their online subscriptions. The icon links to the online full text from the provider selected by the institution. For your subscribers to link to full text at your site via PubMed, you must submit links to LinkOut (more about the use of links submitted to LinkOut).

Prerequisites for Participation

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1. Journals must be included in PubMed for links to be made. To be included in PubMed, a journal must go through the MEDLINE selection process. Please see the details at:

http://www.nlm.nih.gov/pubs/factsheets/jsel.html

http://www.nlm.nih.gov/pubs/factsheets/j_sel_faq.html

2. Publishers of journals included in PubMed should submit their citation data electronically BEFORE submitting links to online full text. See PubMed’s Information for Publishers for details on submitting electronic data to PubMed.

When a publisher submits links without sending electronic citation data, links will be shown in the LinkOut display only. The publisher’s icon will not appear by default in PubMed’s Abstract and Records displays, unless full text is freely available (more about default icons).

3. Full-text providers that restrict access to full text may provide links to summary pages, provided that a link to the full text is prominently displayed on the summary page. In this case, providers should use one of the full-text attributes to inform users that full text is available.

For more information, see the Guidelines for Evaluation of Resources.

Apply for Inclusion in LinkOut

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To apply for inclusion in LinkOut, send an email to linkout/at/ncbi.nlm.nih.gov with the following information included:

  • Name, email address, and phone number of a contact person in your organization.

  • Your account name, if your organization currently provides electronic citation data to NCBI.

  • The scope of your resource. Publishers should provide journal titles and ISSNs; journal aggregators may provide a description of their collection.

  • Describe any restrictions on access to full text.

A LinkOut team member will email the contact person within 1 week regarding your request.

File Preparation: Identity File

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To create links to your resource, NCBI needs two XML files, an identity file and a resource file.

The identity file contains the information needed to list a provider in LinkOut. This file must be named providerinfo.xml; the file name is case sensitive. This file should be composed in a text editor, such as NotePad, not in a word processing program.

For complete file specifications and description of elements, see LinkOut Technical Information: Identity File or the LinkOut DTD.

The following is an example providerinfo.xml file for the LinkOut participant, Good Publisher, Inc. with Provider Id 8888 and NameAbbr GoodPublisher.

<?xml version="1.0"?>
<!DOCTYPE Provider PUBLIC "-//NLM//DTD LinkOut 1.0//EN"
"http://www.ncbi.nlm.nih.gov/projects/linkout/doc/LinkOut.dtd">
<Provider>
<!-- ProviderId is assigned by NCBI -->
    <ProviderId>8888</ProviderId>
    <Name>Good Publisher, Inc.</Name>
    <NameAbbr>GoodPublisher</NameAbbr>
    <SubjectType>publishers/providers</SubjectType>
    <Attribute>publisher of information in URL</Attribute>
    <Attribute>subscription/membership/fee required</Attribute>
<!-- Url is used in My NCBI and the LinkOut Journals and Providers lists -->
    <Url>http://www.goodpublisher.com</Url>
<!-- Brief is used in My NCBI -->
    <Brief>
    An international publisher of biomedical journals and books
    </Brief>
</Provider>

<SubjectType> and <Attribute> elements included in the providerinfo.xml file will apply to all links submitted by the provider. In the example above, a subscription is required to access all full text at the provider’s site, therefore <Attribute>subscription/membership/fee required</Attribute> has been included in the providerinfo.xml file.

File Preparation: Resource File

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Section Contents

To create links to your resource, NCBI needs two XML files, an identity file and a resource file.

The resource file describes the PubMed records to which your links will be applied and contains the information that LinkOut needs to generate the links. Links described in the resource file must link directly to the full text, requiring no additional searching after a user clicks on the provider’s link.

Resource files must have a file extension .xml; the file extension is case sensitive. File names may contain alpha-numeric characters and underscores only. Special characters and spaces are not allowed. Typically, files are named journals.xml, or journaltitle.xml. To help with file management, a provider may submit more than one resource file.

This file should be composed in a text editor, such as NotePad, not in a word processing program.

Resource File Format

For complete file specifications and description of elements, see LinkOut Technical Information: Resource File or the LinkOut DTD.

The resource file below describes links to web-accessible full text for the journal J Cell Biol. Full text is provided by Good Publisher, Inc., ProviderId 8888.

<?xml version="1.0" ?>
<!DOCTYPE LinkSet PUBLIC "-//NLM//DTD LinkOut 1.0//EN"
"http://www.ncbi.nlm.nih.gov/projects/linkout/doc/LinkOut.dtd"
[<!ENTITY icon.url "http://www.goodpublisher.com/icon/goodpublisher.jpg">
<!ENTITY base.url "http://www.goodmedical.org/cgi/content/" > ]>
<LinkSet>
 <Link>
    <LinkId>1</LinkId>      
    <ProviderId>8888</ProviderId> 
    <IconUrl>&icon.url;</IconUrl>
    <ObjectSelector> 
       <Database>PubMed</Database>
       <ObjectList> 
          <Query> "J Cell Biol" [ta] AND 1997/06/15:2010[dp]</Query> 
       </ObjectList> 
    </ObjectSelector> 
    <ObjectUrl> 
       <Base>&base.url;</Base> 
       <Rule>&lo.issn;/&lo.vol;/&lo.page;</Rule> 
       <Attribute>full-text online</Attribute> 
    </ObjectUrl>
 </Link> 
</LinkSet>

<ObjectList>: Selecting Records in a Resource File

The <ObjectList> element is used to select the NCBI database records to which links will be applied. <ObjectList> contains one or more <Query> elements OR one or more <ObjId> elements. <Query> elements contain a valid PubMed search that will retrieve the records to which the link described in <ObjectUrl> will be applied. <ObjId> elements contain the Unique Identifier (PMID) for records to which the link described in <ObjectUrl> will be applied.

Selecting Records Using <ObjId>

<ObjId> contains the PubMed ID (PMID) for a single PubMed record.

Example: Select record with PMID 9679140
<ObjectList>
<ObjId>9679140</ObjId>
</ObjectList>

More than one <ObjId> can be used in an <ObjectList>.

Example: Select records with PMIDs 9679140 and 12589072
<ObjectList>
<ObjId>9679140</ObjId>
<ObjId>12589072</ObjId>
</ObjectList>

Because <ObjId> requires more maintenance than <Query>, NCBI recommends using <Query> whenever possible. When <ObjId> is used, the provider is responsible for updating the resource file as new records are submitted to PubMed.

Selecting Records Using <Query>

The <Query> element must contain a valid PubMed search. Please see Searching PubMed for information on constructing PubMed searches. Note that all components of a query would need to be valid for links to be created.

Tips for using <Query>
1.

Use either NLM’s Title Abbreviations [ta] or ISSN numbers in journal searches. Title Abbreviations must be entered in double quotes, e.g., “J Mol Dis” [ta].

2.

Include the date range for full text. Use this format: startyear:endyear[dp]. Dates should be notated as YYYY/MM/DD. Month and Day are optional.

3.

Ranging is not allowed in Volume, Issue, Page, or PMID searches.

4.

Truncation is not allowed in search statements.

5.

Search field tags must be enclosed in square brackets.

6.

To apply a rolling embargo to records included in or excluded from a query, use “last x (day|weeks|months|years)”[dp] to select records based on the time period indicated. Dates are calculated as follows: 1 week = 7 days, 1 month = 30 days, 1 year = 365 days.

7.

Do not use the search field tags [sb] of [filter]. The only exception is future [sb]. Future [sb] will include or exclude all citations with a publication date after today.

8.

Boolean operators AND, OR, NOT must be in uppercase.

Example: Select records for the journal “J Mol Dis” starting from the publication date, June 15, 1997. As new records are submitted to PubMed, links will be applied automatically.
<ObjectList>
<Query> “J Mol Dis” [ta] AND 1997/06/15:2010 [dp]</Query>
</ObjectList>
Example: Select records for the journal “J Mol Dis” written by J Smith. As new records are submitted to PubMed, links will be applied automatically.
<ObjectList>
<Query> “J Mol Dis” [ta] AND Smith J [au] </Query>
</ObjectList>

More than one <Query> can be listed within the <ObjectList>, as shown in the Example below.

Example: Select records for the journal “J Mol Dis” with a publication date from June 15, 1997 and records for the journal “J Feet” starting from January 1, 2000. As new records are submitted to PubMed, links will be applied automatically.
<ObjectList>
<Query> “J Mol Dis” [ta] AND 1997/06/15:2010 [dp]</Query>
<Query>”J Feet”[ta] AND 2000:2010[dp]</Query>
</ObjectList>

To apply a rolling embargo to records included in or excluded from a query, use “last x (weeks|months|year)”[dp] to select records based on the time period indicated.

Example: Select records for the journal “J Mol Dis” with publication date June 15, 1997 to the date 6 months earlier than today. Links will not be applied to records published in the last 6 months.
<ObjectList>
<Query> “J Mol Dis” [ta] AND 1997/06/15:2010 [dp] NOT “last 6 months”[dp]</Query>
</ObjectList>

Citation providers sometimes submit records for articles that have not yet been published. “last x (weeks|months|year)”[dp] is very literal and will only select or exclude records from the past. To exclude records with a publication date in the future, use future[sb].

Example: Select records for the journal “J Mol Dis” with publication date 1997 to the present. Links will not be applied to records published in the last six months or with a future publication date.
<ObjectList>
<Query> “J Mol Dis” [ta] AND 1997:2010 [dp] NOT “last 6 months”[dp] NOT future[sb]</Query>
</ObjectList>

Records may also be submitted to PubMed for “ahead of print” articles (articles that are available online before they are available in print). To select these records, use pubstatusaheadofprint.

Example: Select ahead of print records for the journal “J Mol Dis”.
<ObjectList>
<Query> “J Mol Dis” [ta] AND pubstatusaheadofprint</Query>
</ObjectList>

Resource File Examples

Example 1: Dental Publications, Inc., Provider Id 1234, provides links from the PubMed records with PMIDs 98765432 and 87654321. URLs for the full text in PDF format are created using an internal identification number that is not included in PubMed, so links are created individually for each record. To minimize the repetition of textual data, the Icon URL and the Base URL have been defined as Entities in the Prolog of the file.

<?xml version="1.0"?>
<!DOCTYPE LinkSet PUBLIC "-//NLM//DTD LinkOut 1.0//EN" 
"http://www.ncbi.nlm.nih.gov/projects/linkout/doc/LinkOut.dtd"
[<!ENTITY icon.url "http://www.dentalpub.com/images/fulltext.gif">
<!ENTITY base.url "http://www.dentalpub.com/Articles.asp?">]>
<LinkSet>
<Link>
   <LinkId>1</LinkId>
   <ProviderId>1234</ProviderId>
   <IconUrl>&icon.url;</IconUrl>
      <ObjectSelector>
         <Database>PubMed</Database>
         <ObjectList>
            <ObjId>98765432</ObjId>
         </ObjectList>
      </ObjectSelector>
   <ObjectUrl>
      <Base>&base.url;</Base>
      <Rule>AID=1988</Rule>
      <Attribute>subscription/membership/fee required</Attribute>
      <Attribute>full-text PDF</Attribute>
   </ObjectUrl>
</Link>
<Link>
   <LinkId>2</LinkId>
   <ProviderId>1234</ProviderId>
   <IconUrl>&icon.url;</IconUrl>
      <ObjectSelector>
         <Database>PubMed</Database>
         <ObjectList>
            <ObjId>87654321</ObjId>
         </ObjectList>
      </ObjectSelector>
   <ObjectUrl>
      <Base>&base.url;</Base>
      <Rule>AID=1989</Rule>
      <Attribute>subscription/membership/fee required</Attribute>
      <Attribute>full-text PDF</Attribute>
   </ObjectUrl>
</Link>
</LinkSet>

Example 2: Good Medical, Inc., Provider Id 4321, provides free online access to the publications Journal of Feet [ISSN 1234-5678] and Skin Graft International [ISSN 8765-4321] in HTML format. The URL to access online full text at their site follows this pattern for each article: http://www.goodmedical.org/cgi/full/[ISSN]/[volume number]/[start page]

<?xml version="1.0" ?> 
<!DOCTYPE LinkSet PUBLIC "-//NLM//DTD LinkOut 1.0//EN"
"http://www.ncbi.nlm.nih.gov/projects/linkout/doc/LinkOut.dtd">
<LinkSet>
 <Link>
   <LinkId>1</LinkId>
      <ProviderId>8888</ProviderId>
      <IconUrl>http://www.goodmedical.org/icon/goodmedical.jpg</IconUrl>
      <ObjectSelector>
         <Database>PubMed</Database>
         <ObjectList>
            <Query>"J Feet" [ta] AND 1997/06/15:2010[dp]</Query>
            <Query>"Skin Graft Int" [ta]</Query>
         </ObjectList>
      </ObjectSelector>
      <ObjectUrl>
         <Base>http://www.goodmedical.org/cgi/full/</Base>
         <Rule>&lo.issn;/&lo.vol;/&lo.page;</Rule>
         <Attribute>full-text online</Attribute>
      </ObjectUrl>
  </Link>
</LinkSet>

Example 3: A record may be retrieved by more than one <Query>. When this happens, link assignment will be handled as described in Duplicate Links and Multiple Links.

If these queries are in different Link elements, <Attribute>preference</Attribute> can be used to indicate which <Link> element should be applied to the record. This is generally used in situations where the links for a subset of a range have a different URL pattern or different access restrictions. See Duplicate Links and Multiple Links for more information.

In the example below, an article by J Smith in “J Mol Dis” published in 1998 will be retrieved by the <Query> statements in both LinkId 2 and LinkId 3.

The LinkOut provider Good Publisher, Inc. provides links to the full text of two of their journals, J Mol Dis and J Biol Chem.

LinkId 1 selects articles for PMID 9679140 and 9679141, a special case. The records are selected using <ObjId> and have a special <Rule>. They are available online in PostScript format; a subscription is required to access the full text. Because these records are also included in LinkId 3, <Attribute>preference</Attribute> is used to indicate that only this link should be applied to these citations.

LinkId 2 is for all articles authored by J Smith published in the journal J Mol Dis. These are freely available in PFD format. A special icon is used for these articles. Because these records are also included in LinkId 3, <Attribute>preference</Attribute> is used to indicate that only this link should be applied to these citations.

LinkId 3 applies to the remainder of the J Mol Dis articles and all J Biol Chem articles supplied by Good Publisher, Inc., where a subscription is required to access the full text. They are available in HTML format. This link will not be applied to the citations included in LinkId 1 and LinkId 2.

As both LinkId 1 and LinkId 2 describe specific requirements, they are listed before the general LinkId 3. 

<?xml version="1.0"?> 
<!DOCTYPE LinkSet PUBLIC "-//NLM//DTD LinkOut 1.0//EN"
"http://www.ncbi.nlm.nih.gov/projects/linkout/doc/LinkOut.dtd" 
[ <!ENTITY icon.url "http://www.goodpublisher.com/icon/goodpublisher.jpg">
<!ENTITY base.url "http://www.goodmedical.org/cgi/content/" > ]>
<LinkSet>
<Link> 
   <LinkId>1</LinkId>
   <ProviderId>8888</ProviderId>
   <IconUrl>&icon.url;</IconUrl>
   <ObjectSelector>
       <Database>PubMed</Database>
       <ObjectList>
              <ObjId>9679140</ObjId>
              <ObjId>9679141</ObjId>
      </ObjectList>
  </ObjectSelector>
   <ObjectUrl>
           <Base>&base.url;</Base>
           <Rule>pmidlookup?view=reprint&amp;pmid=&lo.id;</Rule>
        <Attribute>full-text PostScript</Attribute>
        <Attribute>subscription/membership/fee required</Attribute>
        <Attribute>preference</Attribute>
    </ObjectUrl>
 </Link>
 <Link> 
   <LinkId>2</LinkId>
   <ProviderId>8888</ProviderId>
    <IconUrl>http://www.goodpublisher.com/pubmed/smith.gif</IconUrl>
   <ObjectSelector>
       <Database>PubMed</Database>
       <ObjectList>
              <Query>"J Mol Dis" [ta] AND Smith J [auth]</Query>
        </ObjectList>
    </ObjectSelector>
    <ObjectUrl>
             <Base>&base.url;</Base>
             <Rule>&lo.issn;/&lo.vol;/&lo.page;</Rule>
          <Attribute>full-text PDF</Attribute>
          <Attribute>preference</Attribute>
    </ObjectUrl>
</Link>
<Link>
   <LinkId>3</LinkId>
   <ProviderId>8888</ProviderId>
   <IconUrl>&icon.url;</IconUrl>
   <ObjectSelector>
       <Database>PubMed</Database>
       <ObjectList>
              <Query>"J Mol Dis" [ta] AND 1997:2010 [dp]</Query>
              <Query>"J Biol Chem" [ta] AND 1996:2010[dp]</Query>
        </ObjectList>
    </ObjectSelector>
    <ObjectUrl>
             <Base>&base.url;</Base> 
             <Rule>&lo.issn;/&lo.vol;/&lo.page;</Rule>
        <Attribute>full-text online</Attribute>
        <Attribute>subscription/membership/fee required</Attribute>
     </ObjectUrl>
</Link>
</LinkSet>

Linking with PII/DOI

PII and DOI are identifiers supplied by the publisher. PII is a Publisher Item Identification, assigned by the publisher for internal use. DOI is a Digital Object Identifier (more about DOI).

Links can be created using DOI or PII. Links will appear on all records in the <ObjectList> for which PII or DOI has been submitted by the publisher. NCBI does not input DOI or PII in PubMed records; to create links using PII or DOI, these values must be included when the record is submitted electronically. Publishers should submit PII/DOI for records ONLY if they will be used for linking.

To link using DOI/PII, identify a resolver that can locate the full text in the <Base> element and use the appropriate entity in the <Rule> element.

Example
Retrieved record:
Journal [ISSN 1234-5678]. 2004 Sep; 27(1):3-10
PMID: 98765432
DOI:10.1096/ajs59-5497
PII:12345678/2713
Link using DOI:
<Base>http://dx.doi.org/</Base>
<Rule>&lo.doi;<Rule>
Resulting URL: http://dx.doi.org/10.1096/ajs59-5497
Link using PII:
<Base>http://www.goodmedical.org/links/record/</Base>
<Rule>&lo.pii;.php<Rule>
Resulting URL: http://www.goodmedical.org/links/record/12345678/2713.php

File Evaluation

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After your application for inclusion in LinkOut has been accepted, prepare an identity file and a sample resource file. Resource files should contain links to at least five PubMed records.

Validate the files using the LinkOut http://www.ncbi.nlm.nih.gov/projects/linkout/doc/validate.shtml. Email the files to linkout/at/ncbi.nlm.nih.gov.

Your files will be evaluated by the LinkOut team, and you will be contacted regarding any corrections. The evaluation process will continue until your files are substantially error free.

Account Assignment

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When the submitted files are substantially error free, you will be assigned a ProviderId (PrId) and an approved name abbreviation (NameAbbr), and you will be given a password for an NCBI FTP account.

Please note that each provider will be given only one FTP account at NCBI. A single provider may submit links on behalf of multiple publishers; different icons may be used in PubMed to establish the identity for each journal.

File Transfer

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When you receive your account information, validate the files using the LinkOut http://www.ncbi.nlm.nih.gov/projects/linkout/doc/validate.shtml and transfer all files via FTP to the host FTP-private.ncbi.nlm.nih.gov. Place the files in the “holdings” directory of your account. No subdirectories may be created in the holdings directory.

When files have been submitted, inform the LinkOut team at linkout/at/ncbi.nlm.nih.gov. Your files will be given a final evaluation before being placed in the production queue. From this point on, files will be processed automatically every day.

Links should appear in PubMed within 2 days of file submission. For instructions on viewing your links, see Using LinkOut. If 2 days have passed and you do not see your links in PubMed, please write to linkout/at/ncbi.nlm.nih.gov.

File Maintenance

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Provider Responsibilities

Link providers are responsible for:

  • maintaining their LinkOut files

  • transferring any additions, changes, or deletions of their links to NCBI

  • updating files and informing NCBI when access rights are changed

  • correcting broken or incorrect links in a timely manner

Providers may transfer new versions of current files or add new resource files at any time. It is the responsibility of the provider to keep files current and valid. Links in PubMed are regenerated every day based on the resource files in each provider’s directory; therefore, providers must delete obsolete files from their holdings directory.

Additional provider responsibilities are described in LinkOut Policies: Provider Responsibilities.

Confirmation and Error Messages

Upon processing an updated file, NCBI will send an acknowledgement to the designated LinkOut contact. If you prefer not to receive this acknowledgement, please notify the LinkOut Team at linkout@ncbi.nlm.nih.gov.

If files cannot be processed because of errors, a message with the subject line “LinkOut files uploaded to NCBI - Critical ERRORS!” will be sent to the LinkOut contact. The files should be corrected and resubmitted. If you have any questions about the errors, contact LinkOut at linkout/at/ncbi.nlm.nih.gov.

Provider Statistics

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LinkOut collects statistics on the number of clicks on each publisher’s icons in PubMed’s Abstract display, and clicks on the publisher’s links in the LinkOut list of resources.

Statistics can be emailed to the LinkOut contact monthly. If you would like to receive statistics, please notify the LinkOut Team at linkout/at/ncbi.nlm.nih.gov

Statistics send via email include the yearly and monthly totals for clicks on a provider’s links, which are sorted by journal (a CSV file with the same information is provided as an attachment as well).

Statistics may change for the first 2 weeks that they are available. After 2 weeks, statistics will be stable.

A sample statistics report is shown below:

Image statsft.jpg

Additional Information about Linking

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Section Contents

Deleted PMIDs

From time to time, records are deleted from the PubMed database. Please see the publisher journal submission FAQ for details.

If you provide links using PMIDs in LinkOut files and the PMIDs are deleted, your links will disappear from PubMed.  If you use these PMIDs to link to PubMed from your system, these links will be broken.

A list of all PMIDs that have been deleted since October 2004 is available at:
ftp://ftp.ncbi.nlm.nih.gov/pubmed/deleted_pmids.txt

This plain text file is updated every night at 10:00 p.m. Eastern Time.  Please consult this list frequently to synchronize your linking system with PubMed to ensure proper functioning of your links.

Adding/Changing DOI/PII in PubMed Records (for Linking Purposes Only)

NLM and NCBI do not input DOI or PII in PubMed records; this information must be submitted by the provider that is submitting electronic citation data for the journal. For citations that are already in PubMed, DOI/PII information can be added or updated by submitting the new or updated information to NCBI. DOI/PII can only be changed by the provider that is currently submitting electronic citation data for the journal. Similarly, only the current provider of a journal title would be able to submit DOI/PII information for backfiles.

There are two ways to submit updated DOI/PII for PubMed records. You can submit a text file containing PMID and DOI/PII pairs, or you can send citation data for back issues with DOI/PII included.

To submit a text file:

  • Locate the PMIDs of the citations for which DOI/PII will be assigned or updated. LinkOut can assist in finding PMIDs.

  • Create a text file of PMID</tab>DOI or PMID</tab>PII pairs. Each pair should appear on one line of the file.

  • DOI files must have the extension .doi.

  • PII files must have the extension .pii.

  • Each file may contain up to 10,000 pairs. You may submit multiple files.

Alternatively, send citations for back issues with DOI/PII included.

  • This cannot be done for pubstatusaheadofprint citations.

  • Send one journal issue or volume per file.

  • Citations will be matched to PubMed records. Citations that cannot be matched with be rejected.

Place files in the pid directory of your FTP account. If you don’t have a pid directory, write to linkout/at/ncbi.nlm.nih.gov to request a pid directory in your FTP account. Text files will be processed in about 24 hours, citation files will be processed in about 48 hours.

Transferring Journals Between Publishers

When a journal is transferred to a new publisher, LinkOut needs to be informed so that the default icon can be changed (more about the default icon), and to ensure that links continue to function properly. To do this, please send the following information to linkout/at/ncbi.nlm.nih.gov.

  • Is the journal being added or deleted?

  • Journal title and ISSN.

  • Publisher name and LinkOut account name.

If the journal is being added to your collection, please also include the following:

  • Name of previous publisher

  • When will change take place?

  • When will you start submitting citation data?

  • When will you submit links for the journal? (This should be done after citation files are submitted for the first time.)

  • Will back content of the journal be hosted on your site?

  • Will libraries that subscribe to the journal have access to all content available for the journal at your site?

  • Should your icons appear on back content in PubMed? (This can be done only if the previous publisher’s links are not working, or if the copyright holder approves the change.)

If the journal is being removed from your collection, please also include the following:

  • Is the journal being transferred to a new publisher? Which?

  • When will the change take place?

  • When will you stop submitting links for the journal or update your LinkOut files to stop links from being generated for new content?

  • Will back content continue to be hosted at your site?

  • Should your icons appear on back content in PubMed? (If links are not working, they will be removed. Icon can continue to appear on back content if copyright holder approves it.)

  • Will the libraries that subscribed to the journal continue to have access to back content at your site?

Both old and new provider links should be working during the transition

Copyright Notice: http://www.ncbi.nlm.nih.gov/books/about/copyright/

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