Nat. Weather Service DTD/Schema issue?

[stevecrozz]

This XML feed comes straight from NOAA, I need to transform it via XSLT. Here's my blank stylesheet:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="

http://www.w3.org/1999/XSL/Transform">

</xsl:stylesheet>

Nothing special, but I get this error:
"The element 'current_observation' is used but not declared in the DTD/Schema."

what is the cause of this error?

http://www.weather.gov/data/current_obs/current_observation.xsd

seems to be a valid DTD is it not?

Here's the XML::

<?xml version="1.0" encoding="ISO-8859-1"?>
<current_observation version="1.0"
xmlns:xsd="

http://www.w3.org/2001/XMLSchema"

xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"

xsi:noNamespaceSchemaLocation="

http://www.weather.gov/data/current_obs/current_observation.xsd">

<credit>NOAA's National Weather Service</credit>
<credit_URL>

http://weather.gov/</credit_URL>

<image>
<url>

http://weather.gov/images/xml_logo.gif</url>

<title>NOAA's National Weather Service</title>
<link>

http://weather.gov</link>

</image>
<suggested_pickup>15 minutes after the hour</suggested_pickup>
<suggested_pickup_period>60</suggested_pickup_period>
<location>Fresno Air Terminal, CA</location>
<station_id>KFAT</station_id>
<latitude>36.46.48N</latitude>
<longitude>119.43.10W</longitude>
<observation_time>Last Updated on Jul 19, 1:56 pm PDT</observation_time>
<observation_time_rfc822>Wed, 19 Jul 2006 13:56:00 -0700 PDT</observation_time_rfc822>
<weather>Partly Cloudy</weather>
<temperature_string>103 F (39 C)</temperature_string>
<temp_f>103</temp_f>
<temp_c>39</temp_c>
<relative_humidity>22</relative_humidity>
<wind_string>From the North at 8 MPH</wind_string>
<wind_dir>North</wind_dir>
<wind_degrees>350</wind_degrees>
<wind_mph>8.05</wind_mph>
<wind_gust_mph>NA</wind_gust_mph>
<pressure_string>29.81&quot; (1009.0 mb)</pressure_string>
<pressure_mb>1009.0</pressure_mb>
<pressure_in>29.81</pressure_in>
<dewpoint_string>57 F (14 C)</dewpoint_string>
<dewpoint_f>57</dewpoint_f>
<dewpoint_c>14</dewpoint_c>
<heat_index_string>102 F (39 C)</heat_index_string>
<heat_index_f>102</heat_index_f>
<heat_index_c>39</heat_index_c>
<windchill_string>NA</windchill_string>
<windchill_f>NA</windchill_f>
<windchill_c>NA</windchill_c>
<visibility_mi>10.00</visibility_mi>
<icon_url_base>

http://weather.gov/weather/images/fcicons/</icon_url_base>

<icon_url_name>sct.jpg</icon_url_name>
<two_day_history_url>

http://www.weather.gov/data/obhistory/KFAT.html</two_day_history_url>

<ob_url>

http://www.nws.noaa.gov/data/METAR/KFAT.1.txt</ob_url>

<disclaimer_url>

http://weather.gov/disclaimer.html</disclaimer_url>

<copyright_url>

http://weather.gov/disclaimer.html</copyright_url>

<privacy_policy_url>

http://weather.gov/notice.html</privacy_policy_url>

</current_observation>

 

[stevecrozz]

solution: malformed XSD at the NOAA, I'm working with them on it now.

 

[k5tm]

So, can you make it stop validating? You have learned that many documents in current use are not schema valid. If the document suits your purposes, why waste the time doing a schema validation?

Tom Morrison

http://www.liant.com

 

[stevecrozz]

Well, I can remove the line after I get it, but thats one extra step to take. I don't control the way the national weather service sends their xml. They specify a schema in their XML, why should I have to write a script to remove that line when I can just ask them to fix it?

Besides it will be better for everyone who uses their service if they don't have malformed schemas.

 

[k5tm]

What tool are you using to process the XML document?

Tom Morrison

http://www.liant.com

 

[stevecrozz]

I'm using cooktop for testing right now, do you have a better suggestion? It was just the first thing I found that works.

The solution will be implemented in PERL using XML::XSLT module.

 

[k5tm]

I do not have the documentation for Cooktop, but it would seem like there might be a setting to stop the schema validation.

It might be the case that XML::XSLT still uses the XML:OM:arser nonvalidating parser, it which case all of this issue will go away.

Tom Morrison

http://www.liant.com