In the text section you can input TEXT terms that have to be contained in the respective sections of the result documents.
By selecting from the first dropdown menu you can select the section that will be searched.
The second dropdown can be used to refine the search by creating logical expressions of terms in different sections.
- FullText searches the text in all indices.
- Abstract searches in abstract
- Title searches in altTitle and Title
- Author searches in the name of the organizaion publishing the metadata.
- Subject searches in the Keyword,Subject and TopiCat fields.
For example. If you want the word
weather to occur in the
abstract of the result document you would input
weather into the textbox and select
abstract from the dropdown. The query part of the SRU query will then read
query=abstract all weather
A more complex query, searching for documents having a title containing
collection any having been published by
WMO, would result in the following query:
query=author all WMO and serverChoice all collection
When you press the SEND button the query in the textfield will be sent to the server and the result displayed in your browser.
By clicking into the escape checkbox you can toggle the escaping of special characters in the query. This is for readability only, since the query will always be submitted properly escaped.
You can change the query that will be made by editing the query in the textfield. This can e.G be used to submit the query to a server that is not listed as an option in the server selection dropdown.
Since a SRU query is technically just a URL, sending off the query consists only of setting the query in the textfield into your browsers URL field and requesting it from the remote server.
By pressing on the VALIDATE button you can validate the answer of the SRU server against the WIS SRU schema (SRU 1.1 schema). See the
WIS SRU documentation for more info
This option can be used to limit the number of records in the result. By default it is set to 10. Activate the option by inputting a number into the textfield. This option appends maximumRecords=2 to the query. The startRecord is also set to 1, in order to encourage the server to return the actual records rather than only a summary.
This dropdown is used to chose the server that will be querried. You can select your own server by replacing the server shown in the SRU textfield with a custom server.
This option influences the server part of the query, which consists of the internet address of the server (http://example.com) and the location of the service (/sru?) implementing the SRU gateway on the server.
Together: http://example.com/sru?operation=searchRetrieve
Here you can select a keyword to refine the search to WMO subject areas. The selected keyword is searched in the Keyword,Subject and TopiCat fields.
For example. If you select waterPollution from the dropdown a query of query=keywords all waterPollution will be generated.
If you select none no keyword search is made.
This section allows you to do a geospacial search. If you input coordinates into the four texfields the result will be limited to metadata covering the box described by the North,East,South,West extends.
You can use the map below to draw a rectangle whose coordinates will be filled into the coordinate fields automatically.
The following SRU query is generated when you specify a geospacial search:
query=geo.bounds within/partial/nwse "3.86 103.54 -21.94 136.58"
This section allows you to select metadata by timeseries. Two types of timeseries are supported. The first are related to the metadata, the second to the data described by the metadata. For selecting data in an intervall, chose a starting and a ending date.
If no starting or ending date are input, an open time intervall is assumed. A date is not taken into account untill the year field is filled out.
You find below an explanation of the meaning of the options.
- CreationDate indicates the date the metadata was created
- ModificationDate indicates the date the metadata was last modified
- PublicationDate relates to the date the metadata was published.
- BeginningDate and EndingDate cover the actual timeseries of the data that is described by the metadata
For example: If you are searching for metadata having been
published between
2/10/2001 and
5/5/2009 you would select
2 and
Oct in the start date dropdowns and input
2001 into the textfield reading year. To indicate the ending period you would input
5,
May and
2009 in the end date fields.The result of this would be a query reading:
query=publicationDate>20011002 and publicationDate<20090505
The map is used to make coordinate selection easier. For selecting an area, click into the textarea on top to go into selection mode. Left-click and draw a rectangle over the area of interest while holding down the mouse-button. In order to make a new selection, click again into the textarea and draw a new rectangle.
The coordinates will be input into the coordinate-fields automatically.
There is no help for this feature yet.
