Fix link to FLED to point at archive.org copy.

README.md

@@ -31,7 +31,7 @@ Please see the docs/index.html directory for a list of the relevant documents pe
 
 ## HISTORY OF EML
 
-EML was originally based on work done by the [ESA Committee on the Future of Long-Term Ecological Data](http://esa.sdsc.edu/FLED/FLED.html) and on a related paper on ecological metadata by Michener et al. (see Michener, William K., et al., 1997. Ecological Applications, "Nongeospatial metadata for the ecological sciences" Vol 7(1). pp. 330-342.).  Version 1.0 was released at NCEAS in 1997, with further internal releases of versions 1.2, 1.3, and 1.4, all of which followed the FLED recommendations closely in its content implementation. Version 2 was modified substantially after experience using the specification and from feedback from the ecological community, and versions 2.1 and 2.2 introduce significant new features like internationalization, semantic annotations, and support for data papers.
+EML was originally based on work done by the [ESA Committee on the Future of Long-Term Ecological Data](https://web.archive.org/web/20040213204322/http://esa.sdsc.edu/FLED/FLED.html) and on a related paper on ecological metadata by Michener et al. (see Michener, William K., et al., 1997. Ecological Applications, "Nongeospatial metadata for the ecological sciences" Vol 7(1). pp. 330-342.).  Version 1.0 was released at NCEAS in 1997, with further internal releases of versions 1.2, 1.3, and 1.4, all of which followed the FLED recommendations closely in its content implementation. Version 2 was modified substantially after experience using the specification and from feedback from the ecological community, and versions 2.1 and 2.2 introduce significant new features like internationalization, semantic annotations, and support for data papers.
 
 ## VALIDATION
 Some of the rules regarding EML that are important are expressed only in the EML specification, not in the XML Schema files.  This is because XML Schema was not able to express some of the constraints that we felt were important to creating a coherent metadata document, particularly with respect to identifiers and references to identifiers.  Thus, we have included a EML Validity Parser.  It checks both EML rules and the schema rules to be sure an XML document is a valid EML document.  It is included with the release, and provided as an online service. See docs/index.html.