XSL-List,
I can speak to the fact that xml-to-json is extremely useful -- but
you have to think of it in the context of pipelining. It will not be a
simple filter but a sequence of transformations, first, one maps
across from sources into the JSON-as-XML format (which is perfectly
adequate as near as I can tell); the subsequent one produces the
actual JSON. The JSON produced is not the prettiest ever (although I
am no judge) but the model represented is as good as your
transformation makes it. (Having had to do this sort of thing by hand
teaches one to appreciate having a function for it.)
Of course if you don't have consumers demanding JSON, or perhaps there
is an alternative way of producing it that I should consider?
My guess as to the escaped JSON-string output is that you want to use
method='text' not method="json", but I have not tested to confirm.
Indeed, I am very grateful to the WG for working on this whole
living-with-JSON thing (and as always for tool builders), and hope for
the best when it comes to YAML also.
Cheers, Wendell
On Fri, Mar 8, 2019 at 5:07 PM Willem Van Lishout
willemvanlishout(_at_)gmail(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com>
wrote:
I've been experimenting with the xml-to-json function, but for some reason my
output is escaped. Why is that?
Stylesheet:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:f="http://www.w3.org/2005/xpath-functions"; version="3.0">
<xsl:output encoding="UTF-8" method="json"/>
<xsl:template match="/">
<xsl:variable name="transformed">
<xsl:apply-templates select="programs"/>
</xsl:variable>
<xsl:value-of select="xml-to-json($transformed, map{'indent':
true()})"/>
</xsl:template>
<xsl:template match="programs">
<f:array>
<xsl:apply-templates select="program"/>
</f:array>
</xsl:template>
<xsl:template match="program">
<f:map>
<f:string key="title">
<xsl:value-of select="@title"/>
</f:string>
</f:map>
</xsl:template>
</xsl:stylesheet>
input:
<programs>
<program title="ben hur"/>
</programs>
returns:
"[ \n { \"title \" : \"ben hur\" } ]"
Running this with Saxon 9.8 using Oxygen.
On Fri, Mar 8, 2019 at 1:00 PM David Maus lists(_at_)dmaus(_dot_)name
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
On Fri, 08 Mar 2019 12:49:28 +0100,
Mukul Gandhi gandhi(_dot_)mukul(_at_)gmail(_dot_)com wrote:
[1 <text/plain; UTF-8 (7bit)>]
[2 <text/html; UTF-8 (quoted-printable)>]
Hi all,
I find the XPath 3.1 function json-to-xml() quite useful. It can
convert any JSON input to an XML representation. But I'm not
convinced that XPath 3.1's xml-to-json() function (as defined in
the spec) is much useful.
It is very useful to me because it gives full control over the JSON
output.
At work we recently started to publish descriptions of digital objects
as IIIF Manifests [1]. IIIF Manifest is a JSON-based metadata format,
the source of the object descriptions is in XML.
Example: Manuscript Cod. Guelf. 35 Helmst.
XML:
https://github.com/dmj/diglib-iiif/blob/master/examples/mss/35-helmst/mets.xml
JSON: http://iiif.hab.de/object/mss_35-helmst/manifest.json
XSL:
https://github.com/dmj/diglib-iiif/blob/master/src/IIIF/Mapper/METS2IIIFv2.xsl
Not sure if a 'generic' XML to JSON conversion would be of much
help. Being explicit about the JSON structure makes the transformation
manageable.
Best,
-- David
Taking an example from XPath 3.1 F&O spec, the following XML document
<array
xmlns="http://www.w3.org/2005/xpath-functions";><number>1</number><string>is</string><boolean>1</boolean></array>
converts into following JSON by the function xml-to-json(),
[1,"is",true]
(which is fine)
But as per the XPath 3.1 F&O spec, simple XML documents like,
<root>
<val>1</val>
<val>2</val>
<val>3</val>
<val>4</val>
</root>
cannot be converted into JSON, by the function xml-to-json(), since the
XML input doesn't conform to structure like <array>, <number>, <string>
etc (which looks to me, a very limited capability given to the
xml-to-json() function).
Any comments would be useful.
--
Regards,
Mukul Gandhi
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Wendell Piez | wendellpiez.com | wendell -at- nist -dot- gov
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