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4.3 Metadata

This section refers to XHTML 1.1. The specification for XHTML 2.0 is somewhat different.

This topic provides an overview of metadata standards, how they are used and applied and guidelines for producing effective, usable metadata for Web site content. Good quality metadata helps ensure that content is correctly indexed by search engines and content repositories.

Given the myriad of metadata standards, classification systems and ontological languages, the seemingly simple task of indexing Web site content can seem daunting. Add to this the mixed bag of advice that one receives on how to maximize search-engine rankings and the picture becomes decidedly murky.

This topic focuses on metadata best practices at Web page level and describes metadata encoding practices using the XHTML metadata tags and the FAO specific Agricultural Metadata Element Set project (AgMES).

The following areas will be introduced in this topic:

  • What is metadata?;
  • Why embed metadata in Web pages?;
  • How to embed basic metadata in the HTML <head> section;
  • How to create or improve current metadata on your Web pages;
  • FAO standards for encoded metadata; and
  • Metadata, search engines and their robots.

Note that specific aspects of metadata and encoding practices, such as FAO specific metadata, Best practices for metadata encoding, Advanced metadata for Web pages and How to prepare for the ontological future, are covered in complementary documents available on the Agricultural Metadata Element Set project (AgMES) Web site.