Data Source Tutorial | Appendix B: Data Parser |
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width="11%"><b>Tonight<br></b><br><img src="/images/wtf/ntsra80.jpg" width="55" height="58" alt="Heavy Rain Chance for Measurable Precipitation 80%" title="Heavy Rain Chance for Measurable Precipitation 80%" ><br>Heavy<br>Rain<br>Lo <font color="#0033CC">69°F</font></td><td width="11%"><b>Friday<br></b><br><img src="/images/wtf/hi_tsra20.jpg" width="55" height="58" alt="Slight Chance Thunderstorms Chance for Measurable Precipitation 20%" title="Slight Chance Thunderstorms Chance for Measurable Precipitation 20%" ><br>Slight Chc<br>Tstms<br>Hi <font color="#FF0000">85°F</font></td><td width="11%"><b>Friday<br>Night</b><br><img src="/images/wtf/hi_ntsra20.jpg" width="55" height="58" alt="Slight Chance Thunderstorms Chance for Measurable Precipitation 20%" title="Slight Chance Thunderstorms Chance for Measurable Precipitation 20%" ><br>Slight Chc<br>Tstms<br>Lo <font color="#0033CC">67°F</font></td><td width="11%"><b>Saturday<br></b><br><img src="/images/wtf/few.jpg" width="55" height="58" alt="Mostly Sunny" title="Mostly Sunny" ><br>Mostly<br>Sunny<br>Hi <font color="#FF0000">86°F</font></td><td width="11%"><b>Saturday<br>Night</b><br><img src="/images/wtf/nfew.jpg" width="55" height="58" alt="Mostly Clear" title="Mostly Clear" ><br>Mostly<br>Clear<br>Lo <font color="#0033CC">69°F</font></td><td width="11%"><b>Sunday<br></b><br><img src="/images/wtf/few.jpg" width="55" height="58" alt="Mostly Sunny" title="Mostly Sunny" ><br>Mostly<br>Sunny<br>Hi <font color="#FF0000">92°F</font></td><td width="11%"><b>Sunday<br>Night</b><br><img src="/images/wtf/nsct.jpg" width="55" height="58" alt="Partly Cloudy" title="Partly Cloudy" ><br>Partly<br>Cloudy<br>Lo <font color="#0033CC">75°F</font></td><td width="11%"><b>Monday<br></b><br><img src="/images/wtf/sct.jpg" width="55" height="58" alt="Partly Cloudy" title="Partly Cloudy" ><br>Partly<br>Cloudy<br>Hi <font color="#FF0000">91°F</font></td></tr>
This is a single HTML table row that contains all the weather data we need. Before we extract that data, we use the ReplaceCharacterCodes rule to replace all HTML character codes (e.g. °) with their true characters (e.g. the degree symbol °):
<ParsingRule type="ReplaceCharacterCodes" source="Source" result="Source" />
Now that the text characters are in order, we want to set about extracting each day part's forecast. We use a DataItem element to apply a set of parsing rules
9 times, once for each day part in the HTML code:
<DataItem NumRecords="9" ClearTableOnStart="True">
…
</DataItem>
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