|By Kelvin Goodson, Geoffrey Winn||
|April 10, 2007 03:00 PM EDT||
In Part 1 of this article we introduced SDO, looking at its origins and then reviewing some of its features through a scenario based on medical investigations. In Part 2 we'll go on to examine further features of SDO in such a way as to add property values to a data object beyond those explicitly defined by its type, the ability to record changes made to the data graph, a more elegant way to create types programmatically, and the ability to extend datatypes at runtime.
Our examples will depend on two XML Schema definition files that we'll reproduce here. The full details of the scenario they represent were presented in Part 1. These listings are available at http://gemsres.com/story/dec06/313547/source.html.
Part 1 of this article was published when version 2.01 of the SDO specification was current. Since then v2.1 has been released, however, in this article we'll continue to use version 2.01 for consistency.
Adding Open Content
The scenario begun in Part 1 now unfolds a little further. In particular, we'll examine the addition of values to a DataObject by virtue of the DataObject's type being open; that is to say, the property values in addition to those defined by its type. Joe Johnson has been found to have the rare condition, Panarr Syndrome. The designers of the test's data model have made use of the generic People model described in the first XML Schema from Part 1 and this design decision was only possible because the designer of the People model made the Person type open.
Note how in the schema for the medical test there are two global elements defined, one for the test itself and one for the medical condition. When the schema is read into the SDO runtime, these elements are translated into SDO global properties, scoped in the namespace URI of the schema. They're global properties, because they're not logically part of a type. It's this kind of global property that can be used to add information to an instance of an open type.
Property conditionProperty = XSDHelper.INSTANCE.getGlobalProperty(
"www.example.org/MedicalTest", "condition", true);
DataObject condition = DataFactory.INSTANCE.create(
condition.setString("name", "Panarr Syndrome");
List conditions = person1.getList(conditionProperty);
In this code, SDO's XSDHelper has been used to look up the global property, and the DataFactory has been used to create a DataObject of the appropriate type. The interesting part of this code snippet is that when asked for the list of values associated with the "condition" property of the person DataObject, even though that property doesn't belong to the Person type and was never associated with the Person instance, the call to getList(conditionProperty) resulted in an empty list being created and returned. If the type of Person hadn't been open, this call would have resulted in an exception being thrown. Now we can simply add the condition to the list and any further serialization of this person instance will look like this:
<person gender="male" id="1" name="Joe Johnson Snr.">
<Test:condition name="Panarr Syndrome"/>
It's worth noting that the SDO 2.1 specification adds to the SDO's capability for handling open content metadata and instance data.
Complex Graphs and Non-Containment References
In part 1 we examined one kind of relationship between data objects, that of containment. Every data object other than the root has exactly one parent data object that's its container. However, what if we want to express other relationships? In SDO these are represented by non-containment references.
We've already seen how SDO handles containment. We'll now explore adding complexity to the data graph by using non-containment links. Given the likelihood of members of Joe's family exhibiting Panarr Syndrome we'll add a list of Joe's relatives to the test set:
DataObject relatives = test.createDataObject("relatives");
DataObject person2 = relatives.createDataObject("person");
person2.setString("name", "Joe Johnson Jnr.");
DataObject relation = person1.createDataObject("relative");
This code snippet demonstrates the building of a complex graph using a non-containment link. We've created a new person in the test's set of relatives and made a link to that person from a new "Relative" property value for person1. So now our test looks like this:
<person gender="male" id="1" name="Joe Johnson Snr.">
<relative relationship="child" target="2"/>
<Test:condition name="Panarr Syndrome"/>
<person gender="male" id="2" name="Joe Johnson Jnr."/>
Observe how the target attribute of the relative element has a value of "2," which is the id attribute value of the person "Joe Johnson Jnr" thus establishing the relationship from father to son. Looking back at the schema for Person, note how the use of the XML Schema "ID" attribute in the definition of the Person type and the "IDREF" attribute in the "Relative" type's target element lets us make this non-containment link. Having made the link, SDO needs a bit of help from the schema author to know what kind of value to expect the non-containment link to resolve to and so the "target" attribute is qualified by an sdoxml:propertyType attribute to indicate that any referenced objects will be the type Person.
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
Sep. 25, 2016 01:00 PM EDT Reads: 802
There is little doubt that Big Data solutions will have an increasing role in the Enterprise IT mainstream over time. Big Data at Cloud Expo - to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA - has announced its Call for Papers is open. Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is...
Sep. 25, 2016 12:45 PM EDT Reads: 2,348
DevOps at Cloud Expo, taking place Nov 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 19th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to wait for long dev...
Sep. 25, 2016 12:15 PM EDT Reads: 3,362
Digital innovation is the next big wave of business transformation based on digital technologies of which IoT and Big Data are key components, For example: Business boundary innovation is a challenge to excavate third-party business value using IoT and BigData, like Nest Business structure innovation may propose re-building business structure from scratch, as Uber does in the taxicab industry The social model innovation is also a big challenge to the new social architecture with the design fr...
Sep. 25, 2016 12:15 PM EDT Reads: 1,067
Data is an unusual currency; it is not restricted by the same transactional limitations as money or people. In fact, the more that you leverage your data across multiple business use cases, the more valuable it becomes to the organization. And the same can be said about the organization’s analytics. In his session at 19th Cloud Expo, Bill Schmarzo, CTO for the Big Data Practice at EMC, will introduce a methodology for capturing, enriching and sharing data (and analytics) across the organizati...
Sep. 25, 2016 11:45 AM EDT Reads: 1,630
IoT is fundamentally transforming the auto industry, turning the vehicle into a hub for connected services, including safety, infotainment and usage-based insurance. Auto manufacturers – and businesses across all verticals – have built an entire ecosystem around the Connected Car, creating new customer touch points and revenue streams. In his session at @ThingsExpo, Macario Namie, Head of IoT Strategy at Cisco Jasper, will share real-world examples of how IoT transforms the car from a static p...
Sep. 25, 2016 11:30 AM EDT Reads: 1,497
The vision of a connected smart home is becoming reality with the application of integrated wireless technologies in devices and appliances. The use of standardized and TCP/IP networked wireless technologies in line-powered and battery operated sensors and controls has led to the adoption of radios in the 2.4GHz band, including Wi-Fi, BT/BLE and 802.15.4 applied ZigBee and Thread. This is driving the need for robust wireless coexistence for multiple radios to ensure throughput performance and th...
Sep. 25, 2016 11:00 AM EDT Reads: 1,490
The many IoT deployments around the world are busy integrating smart devices and sensors into their enterprise IT infrastructures. Yet all of this technology – and there are an amazing number of choices – is of no use without the software to gather, communicate, and analyze the new data flows. Without software, there is no IT. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will look at the protocols that communicate data and the emerging data analy...
Sep. 25, 2016 11:00 AM EDT Reads: 1,548
SYS-CON Events announced today that China Unicom will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. China United Network Communications Group Co. Ltd ("China Unicom") was officially established in 2009 on the basis of the merger of former China Netcom and former China Unicom. China Unicom mainly operates a full range of telecommunications services including mobile broadband (GSM, WCDMA, LTE F...
Sep. 25, 2016 10:30 AM EDT Reads: 1,691
The Transparent Cloud-computing Consortium (abbreviation: T-Cloud Consortium) will conduct research activities into changes in the computing model as a result of collaboration between "device" and "cloud" and the creation of new value and markets through organic data processing High speed and high quality networks, and dramatic improvements in computer processing capabilities, have greatly changed the nature of applications and made the storing and processing of data on the network commonplace.
Sep. 25, 2016 10:15 AM EDT Reads: 840
Video experiences should be unique and exciting! But that doesn’t mean you need to patch all the pieces yourself. Users demand rich and engaging experiences and new ways to connect with you. But creating robust video applications at scale can be complicated, time-consuming and expensive. In his session at @ThingsExpo, Zohar Babin, Vice President of Platform, Ecosystem and Community at Kaltura, will discuss how VPaaS enables you to move fast, creating scalable video experiences that reach your...
Sep. 25, 2016 10:00 AM EDT Reads: 904
Big Data has been changing the world. IoT fuels the further transformation recently. How are Big Data and IoT related? In his session at @BigDataExpo, Tony Shan, a renowned visionary and thought leader, will explore the interplay of Big Data and IoT. He will anatomize Big Data and IoT separately in terms of what, which, why, where, when, who, how and how much. He will then analyze the relationship between IoT and Big Data, specifically the drilldown of how the 4Vs of Big Data (Volume, Variety,...
Sep. 25, 2016 10:00 AM EDT Reads: 952
SYS-CON Events announced today that Pulzze Systems will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Pulzze Systems, Inc. provides infrastructure products for the Internet of Things to enable any connected device and system to carry out matched operations without programming. For more information, visit http://www.pulzzesystems.com.
Sep. 25, 2016 09:45 AM EDT Reads: 1,772
If you’re responsible for an application that depends on the data or functionality of various IoT endpoints – either sensors or devices – your brand reputation depends on the security, reliability, and compliance of its many integrated parts. If your application fails to deliver the expected business results, your customers and partners won't care if that failure stems from the code you developed or from a component that you integrated. What can you do to ensure that the endpoints work as expect...
Sep. 25, 2016 09:00 AM EDT Reads: 1,545
WebRTC adoption has generated a wave of creative uses of communications and collaboration through websites, sales apps, customer care and business applications. As WebRTC has become more mainstream it has evolved to use cases beyond the original peer-to-peer case, which has led to a repeating requirement for interoperability with existing infrastructures. In his session at @ThingsExpo, Graham Holt, Executive Vice President of Daitan Group, will cover implementation examples that have enabled ea...
Sep. 25, 2016 08:00 AM EDT Reads: 1,491
Almost two-thirds of companies either have or soon will have IoT as the backbone of their business in 2016. However, IoT is far more complex than most firms expected. How can you not get trapped in the pitfalls? In his session at @ThingsExpo, Tony Shan, a renowned visionary and thought leader, will introduce a holistic method of IoTification, which is the process of IoTifying the existing technology and business models to adopt and leverage IoT. He will drill down to the components in this fra...
Sep. 25, 2016 08:00 AM EDT Reads: 1,517
The Internet of Things can drive efficiency for airlines and airports. In their session at @ThingsExpo, Shyam Varan Nath, Principal Architect with GE, and Sudip Majumder, senior director of development at Oracle, will discuss the technical details of the connected airline baggage and related social media solutions. These IoT applications will enhance travelers' journey experience and drive efficiency for the airlines and the airports. The session will include a working demo and a technical d...
Sep. 25, 2016 08:00 AM EDT Reads: 1,672
SYS-CON Events announced today the Enterprise IoT Bootcamp, being held November 1-2, 2016, in conjunction with 19th Cloud Expo | @ThingsExpo at the Santa Clara Convention Center in Santa Clara, CA. Combined with real-world scenarios and use cases, the Enterprise IoT Bootcamp is not just based on presentations but with hands-on demos and detailed walkthroughs. We will introduce you to a variety of real world use cases prototyped using Arduino, Raspberry Pi, BeagleBone, Spark, and Intel Edison. Y...
Sep. 25, 2016 06:30 AM EDT Reads: 2,810
Technology vendors and analysts are eager to paint a rosy picture of how wonderful IoT is and why your deployment will be great with the use of their products and services. While it is easy to showcase successful IoT solutions, identifying IoT systems that missed the mark or failed can often provide more in the way of key lessons learned. In his session at @ThingsExpo, Peter Vanderminden, Principal Industry Analyst for IoT & Digital Supply Chain to Flatiron Strategies, will focus on how IoT de...
Sep. 25, 2016 05:30 AM EDT Reads: 1,008
Fact is, enterprises have significant legacy voice infrastructure that’s costly to replace with pure IP solutions. How can we bring this analog infrastructure into our shiny new cloud applications? There are proven methods to bind both legacy voice applications and traditional PSTN audio into cloud-based applications and services at a carrier scale. Some of the most successful implementations leverage WebRTC, WebSockets, SIP and other open source technologies. In his session at @ThingsExpo, Da...
Sep. 25, 2016 04:45 AM EDT Reads: 1,523