ITEC325 xslt -- XSLT

xslt
XSLT
a movie encyclopedia

Due: 2015.Apr.20 (Wed) 16:00

We will work with an XML-encoded database of information about movies, movies.xml [be sure to View Source!]. (And, here is a sample/starter movies.xsl.) Submit your files on D2L, with the names “movies.xml” and “movies.xsl”.

(3pts) Add one more movie to the file movies.xml.

(15pts) Create an XSLT template which generates a page with a summary of each movie, looking similar to movies-goal.html.

Feel free to make your page look nicer than that demo.
Have your review-summary-score be a link to a page whose URL is (say) full-reviews.xml#Birdman. This link does not need to lead to an actual, existing page; I just want you to demonstrate that you know how to add attributes to a tag.

For full credit, use translate to convert spaces into hyphens or +s, and to change the following characters that don't belong in URLs ¹ into safe characters (e.g. hyphens): < > = + / ? % #. You are not required to convert " characters as well, because it's a mild pain, but feel free to ².
Dates (years, months, and day) should be padded with leading zeroes.
Note that if the language is English, or there is no language tag, you won't list the movie's languages at all. Similarly, if there is no rating given, list as “Rated: (unrated)”. Finally, if there is no studio, omit the “by” clause next to the date.
Hint: remember the count function.
Be sure to list the actors and genres without a trailing comma.
hint:Recall the example of using position(), near the end of xpath-functions/. If you like, include the word “and” before the last item.
Don't have an “s” at the end of “Genre:” when there is only one genre for the movie.

(2pts) Have your list sorted by release-year, in reverse order (most recent first).

If you want, you can use nested xsl:sort tags to sort by year-month-day ³. Re-arrange the movies in the source-file in such an order as to confirm that this sorting works.)

Tips:

Work incrementally.

Getting no output at all? Make sure your xsl tags are all properly closed.

If you use an xsl:attribute tag, don't include any extra whitespace in the body; this gets turned into whitespace in the attribute which is presumably not what you want.

¹ This is not as effective as a function like php's urlencode, but (a) XSLT 1.0 does not provide a good alternative, and (b) I'm not concerned with finding plugins to run XSLT 2.0. See specs §2.2 for a more technical list of (dis)allowed characters. ↩

The catch is that in XML, you can't have a string-literal (attribute) that contains BOTH an apostrophe AND a double-quote mark — so you can't pass a string to translate containing both those characters. Rats! (If you only need one of those two types of quotes, you can just delimit your string with the other type of quote, so it's not a problem.)

For 1.0, one solution is to use variables and concatenation, to create a string with both types of quotes in it:

           
    <xsl:variable name="apos">'</xsl:variable>
    <xsl:value-of select="…concat('abc',$apos,'def',$quot,'ghi')…"/>

h/t to a Michael Kay

But this digression is further than I want to go in this course — I want to focus on the ideas of XPATH, understanding the need for sanitizing, and reinforcing the notion of calling functions (in new languages). And if you were really using XSLT, hopefully you'd be finding support for XSLT 2.0, and you could just call its function encode-for-url, obviating the whole hack of translateing characters in the title anyway!

↩

³This is actually following a standard CS trick: If you first sort by month and then by year, you'll get what you want as long as the sorting algorithm is “stable” — that is, it leaves tied elements in the same relative order they started in. It makes sense: after the first sort on months, all the Januaries come before all the Februaries. When you now sort by year, and two movies are tied for year, the January one will stay ahead of the February one, in a stable sort. ↩

Please mail any suggestions
(incl. typos, broken links)
to ibarlandradford.edu

xslt XSLTa movie encyclopedia

xslt
XSLT
a movie encyclopedia