物理構造という語は聞いたことないです。物理要素のこと? HTML4.01の仕様書ではBGCOLORやなんかの属性を「HTML presentation attributes」と呼んでる。 DIVの説明に「a generic mechanism for adding structure to documents」とあるほか、「structure the information(情報の構造化)」という語もでてくる。
<!ATTLIST IMG --If the IMG element is contained in a BUTTON element, the IMG shall not have an ISMAP or USEMAP attribute.
If the ISMAP attribute is present in an IMG element, that IMG element shall be contained in an A element with an HREF attribute present.
At most one of the attributes ISMAP and USEMAP may be provided. -- %core; -- Element CLASS, ID and TITLE -- %i18n; -- Internationalization DIR and LANG -- ALT CDATA #REQUIRED -- Text for text-only user agent -- ISMAP (ismap) #IMPLIED -- Use server image map -- LONGDESC %URI; #IMPLIED -- Extended description for text UA -- SRC %URI; #REQUIRED -- URI of image to embed -- USEMAP %URI; #IMPLIED -- Use client-side image map -->