Project Euclid Functionality and Features
This page describes and illustrates many of the features and capabilities offered by Project Euclid. Major sections include:
- Publication Home Pages
- Euclid Article Abstract Pages
- Rendering Mathematical Expressions
- Linking to Euclid
- Examples of Linking into Euclid
Publication Home Pages
- Publication Home Page
Each publication has a home page within Euclid. For journals, this page is always the Table of Contents of the most recent journal issue in Euclid. For monographs and conference proceedings, this page is an introductory page to the monographic series or collection, or to the conference series. There is a concise URL for every Euclid publication home page. These URLs are published on our browse pages. For example:
- Special Issue Titles
Journal issues may have special titles. Examples:
- Table of Contents Subdivisions
Table of contents may have internal subdivisions. Examples:
- Delivering Back Issues
Euclid can store, index, and deliver as much back content as a publisher wishes to include. Back issues are seamlessly integrated with current content. Click the "Past issues" link on any journal's home page:
Euclid Abstract Pages
Abstract pages are where all the data about a journal article or monograph chapter is collected and presented to users. This data includes author names, title, abstract, subject terms and keywords, identifiers, etc. Euclid provides open access to this data–that is, these pages are freely accessible to anyone in the world, whether or not one has access to full-text. When viewing an abstract page, users are informed of their access rights to the full-text.
- Full-text Options
If access to full-text is permitted (via IP check or individual login), then the abstract page includes download options, such as PDF, Screen Optimized PDF, PostScript, DjVu, etc. Euclid has no restrictions on the type or number of files delivered to end users.
If access to full-text is denied (no subscription), publishers may choose to offer a pay-per-view option. This allows non-subscribers to purchase immediate access on an article-by-article basis, at a price set by the publisher. Some examples (only visible if you do not have subscription access to the following titles):
- Cross Service Linking
Project Euclid encourages and facilitates building links to services such as MathSciNet (Math Reviews) and Zentralblatt MATH. For any article in Euclid without such links, the system performs regular, automated "lookups" in these service. If a match is discovered, the link is made available on the abstract page.
- Digital Object Identifiers (DOI)
Euclid, as a member of CrossRef, will register DOIs on behalf of publishers. DOIs are included on article abstract pages.
- Reference Linking
Using an automated process, Euclid extracts and parses article reference sections, performs article lookups in remote databases, and provides outbound links when available. The results are displayed in the "References" section of the article abstract page.
- Forward and Backward Linking
Articles can be linked to later corrections (forward linking), and the correction to its original article (backward linking).
- Cross References
Euclid provides a means of adding related item references, for pointing to article continuations (inside or outside of Euclid), or other related works.
- Supplemental Materials
Publishers may provide supplemental materials (charts, figures, data sets, etc.), to those users with access to the article full-text.
- Subjects, Keywords
All available subjects (primary and secondary) and keywords are displayed on the article abstract page.
- Multi-lingual Article Metadata
Euclid allows multiple versions of titles and abstracts.
Rendering Mathematical Expressions
Project Euclid supports several encoding methods for capturing and rendering mathematical expressions in bibliographic metadata (titles and abstracts). These methods can be used separately or in combination.
Mathematical expressions may be rendered using TeX expressions. Examples:
Euclid supports the use of MathML in titles and abstracts. When using this method, the TeX equivalent is captured in the MathML alttext attribute. If you are not using a MathML capable browser, the TeX encoding should be displayed.
- Images, in-line or display
Some publishers prefer to use images, in formats such as GIF or PNG, for the display of mathematics. If images are used, the TeX encoding is also captured in the image alt attribute (visible on mouseover).
- Special character encoding in Unicode
Many mathematical characters may be expressed using the appropriate Unicode character code value. Euclid encourages publishers to use Unicode character encoding when available. Browser support for the display of such characters is improving. Special characters can be used with HTML formatting.
- HTML formatting
Euclid allows for the use of a few simple HTML formatting elements to support the display of math: italics, bold, underline, super- and sub-scripting. These elements may be used in combination with Unicode special character encoding. Using HTML elements is the least desirable method of rendering mathematical expressions, because it is difficult to capture the TeX encoded equivalent. Some meaningful information (conveyed by formatting such as bold, italics, etc.) may be lost if these records are used in other contexts. Examples of HTML formatting:
Linking to Euclid
Project Euclid encourages and facilitates linking into our system. We have built tools to make linking into Euclid easier, and we share article level metadata with others. More precise details about linking to Euclid publications are available.
- Links to Journal Home Page
Although a journal's current issue will change frequently, every journal has a simple Euclid URL that links to its most recent issue. These URLs are published on our journal browse pages. Examples:
- Links to Abstract Pages
It is possible to link directly to an article or chapter abstract page. The easiest method is to use the Euclid Permanent URL for the article, which is displayed on every article's abstract page:
- Harvesting Article Indentifiers (via IDlookup)
It is possible to harvest Euclid article identifiers for batch processing using our IDlookup tool. This tool requires three arguments: journal ISSN, volume number, article start page number.
- Example IDlookup request:
- Example response (with match):
- Example IDlookup request:
Examples of Linking into Euclid
from Math Reviews
- search for "Iwakiri" in MathSciNet
- scroll to his article "Quadle cocycle invariants of pretzel links," published in the Hiroshima Math. J.
- click on the review number, MR2290662, to look at the MR review
- clicking on the "Article" button in the search results or in the article review will send you to the Euclid article abstract page.
- Math Reviews has use our IDlookup tool to create these links
- search for "Affine Anosov actions" in EULER
- click on Hurder's article "Affine Anosov actions," published in the Mich. Math. J.
- the second record is to the item in Euclid, with a link to the Euclid article abstract page
- EULER has harvested these records from Euclid using OAI
- Other services and resources linking to Euclid, via OAI harvested records
last modified: 1 July 2008