Software Open Access

The D-NET software toolkit: dnet-basic-aggregator

Michele Artini; Claudio Atzori; Alessia Bardi; Sandro La Bruzzo; Paolo Manghi; Andrea Mannocci


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    <subfield code="a">&lt;p&gt;D-Net Software Toolikt&lt;/p&gt;

&lt;p&gt;The D-NET Software Toolkit is a system that offers functionalities for the collection (&amp;ldquo;harvesting&amp;rdquo;), transformation, aggregation, and indexing of metadata records collected from an arbitrary number of data sources, complying with different protocols and data exchange formats. D-NET sets a workflow language, which developers can use to combine a variety of D-NET data management services, configure them to handle data according to given data models, and pipeline them into autonomic data processing workflows.&lt;/p&gt;

&lt;p&gt;This software package is a simplified version of the D-Net toolkit and consists of a web application with a minimal set of services for:&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;
	&lt;p&gt;Collection of metadata records in oai_dc format via OAI-PMH, FTP, local file system, HTTP.&lt;/p&gt;
	&lt;/li&gt;
	&lt;li&gt;
	&lt;p&gt;Transformation of the collected metadata records into an internal format named DMF (Driver Metadata Format)&lt;/p&gt;
	&lt;/li&gt;
	&lt;li&gt;
	&lt;p&gt;Indexing of DMF records in a Solr full-text index&lt;/p&gt;
	&lt;/li&gt;
	&lt;li&gt;
	&lt;p&gt;OAI-PMH export of aggregated metadata records in DMF and oai_dc formats. More formats can be added at runtime by providing a dedicated XSLT from DMF to the desired target format.&lt;/p&gt;
	&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;Major changes in version&amp;nbsp;1.3.0&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;OAI Publisher:
	&lt;ul&gt;
		&lt;li&gt;fixed cache management&lt;/li&gt;
		&lt;li&gt;fixed oai consistency (post feed) workflow branch&lt;/li&gt;
		&lt;li&gt;fixed deletion of content when workflow of data sources are deleted&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;D-Net enabling services:
	&lt;ul&gt;
		&lt;li&gt;using cache for subscription access&lt;/li&gt;
		&lt;li&gt;support only one subscription registry&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Mongo based services (mdstore, oaistore, wf logging):
	&lt;ul&gt;
		&lt;li&gt;using API of mongo-java-driver 3.2.2, removed usage of deprecated methods&lt;/li&gt;
		&lt;li&gt;tracking the number of stored records to possibly highlight the collection of records with the same identifier&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;GUI:
	&lt;ul&gt;
		&lt;li&gt;enabling deletion of APIs via GUI&lt;/li&gt;
		&lt;li&gt;enabling editing of metadata_identifier_path&lt;/li&gt;
		&lt;li&gt;more info available in the datasource section&lt;/li&gt;
		&lt;li&gt;removed map of data sources (TODO: adapt to the new google map API)&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Metadata collection:
	&lt;ul&gt;
		&lt;li&gt;handling HTML illegal entities in collected XMLs&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Indexing:
	&lt;ul&gt;
		&lt;li&gt;default query operator for &amp;quot;bag of words&amp;quot; queries set to AND instead of OR&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Workflow manager
	&lt;ul&gt;
		&lt;li&gt;do not launch workflows that were scheduled for execution during a pause of the aggregation system (&amp;quot;prepare for shutdown&amp;quot;)&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;

&lt;p&gt;Official Web Site: http://www.d-net.research-infrastructures.eu&lt;/p&gt;

&lt;p&gt;Need support? Contact us via email on&amp;nbsp;dnet-team[at]isti.cnr.it&lt;/p&gt;</subfield>
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