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Compute a listing of the papers’ publication data grouped by title. Select [x.Title /

Compute a listing of the papers’ publication data grouped by title. Select [x.Title / Select [z.Publication] from y in csPapers, z in y’ Where x.title = y.title ] From w in csPapers , x in w’. Schema – a distinguished hypertree

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Compute a listing of the papers’ publication data grouped by title. Select [x.Title /

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  1. Compute a listing of the papers’ publication data grouped by title. • Select [x.Title / Select [z.Publication] from y in csPapers, z in y’ Where x.title = y.title ] From w in csPapers , x in w’

  2. Schema – a distinguished hypertree • Browsing function – maps strings (URLs) to hypertree, it defines a graph where the nodes are pages and there is an arc between node a and b if the content of the page at node a contains an external arc whose url attribute is the url of the page at node b.

  3. Analogy with Relational database • Hypertree > Relations • Webs > databases • Schema of a web >catalog of a database

  4. Select [x.Tag] From x in browse(http://www.cs.toronto.edu”) Tag : body] [Tag :head]

  5. SFW creates a web Select [y.Title, y’.URL] as schema From x in csPapers , y in x’ Where y.authors ~”smith” • Create a web page with URL “Group Names” whose content is the list of group names (assume that there is no such page in the current web) • Select [x.Group] as “Group Names” from x in csPapers

  6. Create several pages ; one for each research group (using the group name as URL). Each page contains the publications of the corresponding group • Select x’ as x.Group from x in csPapers

  7. Select q1 as s1, q2 as s2, q3 as s3, ….qm as sm where qi’s are queries and si is either a string query or keyworld Schema. • Generate a web consisting of a page for each research group containing a title and author of all its publications, and an index web page , that lists all the groups and provides links to their pages • newWeb Select unique [Name : x.Group, url : x.Group] as schema [y.Title, y.Authors ] as x.Group From x in csPapers, y in x’

  8. NewerWeb < newWeb • select [ Tag: “H3”, Text: y.Title ] + • [ Tag: “BR”, Text: y.Publication ] + • [ Tag: “BR”, Text: y.Authors ] + • [ Tag: “P” ] • as x.Name • from x in schema, y in x.Name • | • select [ Tag: “H2”, Text: “Publications of the” * x.Name * “ Group” ] + x.Name + • [ Tag: “A”, Label: “To Index”, Url: “http://a.b.c/Index of Projects.html” ] • as “http://a.b.c/” * x.Name * “.html” • from x in schema

  9. | • select [ Url: “http://a.b.c/Index of Projects.html” ] as schema, • [ Tag: “H2”, Text: “Index of Projects” ] + • [ Tag: “UL” / • select [ Tag: “LI” / • [Tag: “A”, Label: x.Name, • Url: “http://a.b.c/” * x.Url * “.html” • ] • ] • from x in schema • ] as “http://a.b.c/Index of Projects.html

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