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Parsley Examples
iterationlabs edited this page Sep 13, 2010
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A simple script, or “dex”, looks like this:
{ "title": "h1", "links(a)": [ { "text": ".", "href": "@href" } ] }
This returns JSON or XML output with the same structure. Applying this dex to http://www.yelp.com/biz/amnesia-san-francisco yields either:
{ "title": "Amnesia", "links": [ { "href": "\/", "text": "Yelp" }, { "href": "\/", "text": "Welcome" }, { "href": "\/signup?return_url=%2Fuser_details", "text": " About Me" }, ..... ] }
or equivalently:
<dexter:root> <title>Amnesia</title> <links> <dexter:group> <href>/</href> <text>Yelp</text> </dexter:group> <dexter:group> <href>/</href> <text>Welcome</text> </dexter:group> <dexter:group> <href>/signup?return_url=%2Fuser_details</href> <text> About Me</text> </dexter:group> ..... </links> </dexter:root>
This dex could also have been expressed as:
{ "title": "h1", "links(a)": [ { "text": ".", "href": "@href" } ] }
The “a” in links(a)
is a “key selector” – an explicit grouping (with scope) for the array. You can use any XPath 1.0 or CSS3 expression as a value or a key selector. Dexter will try to be smart, and figure out which you are using. You can use CSS selectors inside XPath functions – substring-after(h1>a, ':')
is a valid expression.