system/xidel: Added (extract data from HTML/XML/JSON files or pages)

Signed-off-by: Dave Woodfall <dave@slackbuilds.org>

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/system/xidel/README b/system/xidel/README
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+xidel (tool to extract data from HTML/XML/JSON files or pages)
+
+Xidel is a command line tool to query data from HTML/XML web pages,
+JSON-APIs and local files. It implements interpreters for XPath 2,
+XPath 3, XQuery 1, XQuery 3, JSONiq, CSS selectors and custom pattern
+matching.
+
+XPath and CSS selectors are the most efficient way to select certain
+elements from XML/HTML documents. JSONiq (with custom extensions)
+is an easy way to select data from JSON. XQuery is a Turing-complete
+superset of XPath and allows arbitrary data transformations and the
+creation of new documents.
+
+Pattern matching is for XML/HTML documents what regular expressions
+are for plaintext, i.e. pattern matching behaves like a regular
+expression over the space of tags, instead over the space of
+characters.
+
+Xidel implements a kind of internal pipes to pipe HTTP requests from
+one query to the next, so there is no need to distinguish selecting
+links and downloading the data referenced by them. Therefore arbitrary
+complex queries going over arbitrary many pages can be executed with a
+single call of Xidel.
+
+Xidel is a powerful and complex tool, with a steep learning
+curve. For examples, see the man page xidel(1), and also
+/usr/doc/xidel-$VERSION/examples/. The full documentation is available
+via "xidel --usage | less".