a document to represent its structure. There are four
            different kinds of markup: descriptive markup (tags),
            references, markup declarations, and processing
            instructions. [SGML]

    may
            A document or user interface is conforming whether this
            statement applies or not.

    media type
            an Internet Media Type, as per [IMEDIA].

    message entity
            a head and body. The head is a collection of name/value
            fields, and the body is a sequence of octets. The head
            defines the content type and content transfer encoding
            of the body. [MIME]

    minimally conforming
    HTML user agent
            A user agent that conforms to this specification except
            for form processing. It may only process level 1 HTML
            documents.

    must
            Documents or user agents in conflict with this statement
            are not conforming.

    numeric character
    reference
            markup that refers to a character by its code position
            in the document character set.

    SGML document
            A sequence of characters organized physically as a set
            of entities and logically into a hierarchy of elements.
            An SGML document consists of data characters and markup;
            the markup describes the structure of the information
            and an instance of that structure. [SGML]

    shall
            If a document or user agent conflicts with this
            statement, it does not conform to this specification.







 
RFC 1866            Hypertext Markup Language - 2.0        November 1995


    should
            If a document or user agent conflicts with this
            statement, undesirable results may occur in practice
            even though it conforms to this specification.

    start-tag
            Descriptive markup that identifies the start of an
            element and specifies its generic identifier and
            attributes. [SGML]

    syntax-reference
    character set
            A coded character set whose range includes all
            characters used for markup; e.g. name characters and
            delimiter characters.

    tag
            Markup that delimits an element. A tag includes a name
            which refers to an element declaration in the DTD, and
            may include attributes. [SGML]

    text entity
            A finite sequence of characters. A text entity typically
            takes the form of a sequence of octets with some
            associated character encoding scheme, transmitted over
            the network or stored in a file. [SGML]

    typical
            Typical processing is described for many elements. This
            is not a mandatory part of the specification but is
            given as guidance for designers and to help explain the
            uses for which the elements were intended.

    URI
            A Uniform Resource Identifier is a formatted string that
            serves as an identifier for a resource, typically on the
            Internet. URIs are used in HTML to identify the anchors
            of hyperlinks. URIs in common practice include Uniform
            Resource Locators (URLs)[URL] and Relative URLs
            [RELURL].

    user agent
            A component of a distributed system that presents an
            interface and processes requests on behalf of a user;
            for example, a www browser or a mail user agent.