Top option binary xml

See XML, binary file and Protocol Buffers. Binary XML formats compress the XML text into small blocks that can be decompressed sequentially by the receiver. They are thus well suited for processing in handheld devices that would not have the memory and CPU speed to decompress a large file. Binary versions of XML take up less space, and, more importantly, requests and responses take less network bandwidth. Just like any text, an XML file can be compressed with a Zip or other compression algorithm; however, the entire file must be decompressed at the receiving side as a complete unit before any elements can be used. If this is set to true then PSVI information can be accessed using XDK extension APIs for PSVI on DOM. For decoding, the schema is already available in the vocabulary cache. There is a single binary XML processor. In this scenario, there are multiple clients, each running a binary XML processor. Binary XML provides more efficient database storage, updating, indexing, query performance, and fragment extraction than unstructured storage.

All other schemaLocation tags are not explicitly registered. The vocabulary is schema. If tokens of a corresponding namespace are not stored in the local vocabulary cache, then the token set is fetched from the repository. If the schema is available in the database, it is fetched from the repository or database in the binary XML format and registered with the local vocabulary manager. The BinXMLStream object specifies the type of storage during creation. It takes as input the XML text and outputs the encoded binary XML to the BinXMLStream it was created from. Retrieving a binary token set using namespace URL.

Token definitions can also be included as part of the binary XML stream by setting a flag on the encoder. XML Processor can communicate with the database for various types of binary XML operations involving storage and retrieval of binary XML schemas, token sets, and binary XML streams. For strings, there is only support for UTF8 encoding in this release. Compression and decompression of fragments of an XML document facilitate incremental processing. In this scenario there are multiple clients, each running a binary XML processor. This chapter assumes that you are familiar with the XML Parser for Java. BinXMLEncoder and BinXMLDecoder can be created from the BinXMLStream for encoding or decoding.

Currently only one metadata provider for each processor is supported. XML processor can originate or receive network protocol requests. You must code a FileBinXMLMetadataProvider that implements the BinXMLMetadataProvider interface. It can be a file system or some other repository. The metadata connection is used for transferring the token set to the database. The schema annotator annotates the schema text with system level annotations. BinXMLMetadataProvider interface and plugging it into the BinXMLProcessor. The vocabulary cache assigns a unique vocabulary id for each XML schema object, which is returned as output.

If the decoding occurs in a different binary XML processor, see the different Web Services models described here. XML processor and is identifiable only within the scope of that binary XML processor. In this case, schemas and token sets are registered with the database. Token sets can be fetched from the database or metadata repository, cached in the local vocabulary manager and used for decoding. The schema might already have some user level annotations. It is your responsibility to create a table containing an XMLType column with binary XML for storing the result of encoding and retrieving the binary XML for decoding. URL has been registered with the vocabulary manager.

It is assumed that the schema is registered with the database before encoding. If a schema is associated with the BinXMLStream, the binary XML decoder retrieves the associated schema object from the vocabulary cache using the vocabulary id before decoding. In this scenario, the binary XML processor is connected to a database using JDBC. If no schema is associated with BinXMLStream, then the token definitions can be either inline in the BinXMLStream or stored in a token set. An XMLType storage option is provided to enable storing XML documents in the new binary format. For efficiency, the DOM and SAX APIs are provided on top of binary XML for direct consumption by the XML applications. One client does the encoding and the other client does the decoding. The second binary XML processor is used for decoding, is not aware of the location of the schema, and fetches the schema from the repository.

Here is the flow of this process: If the vocabulary is an XML schema; it takes the XML schema text as input. Use hdlr in the application that generates the SAX events. The resulting annotated schema is processed by the Schema Builder to build an XML schema object. The vocabulary id associated with the schema, as well as the binary version of the compiled schema is retrieved back from the database; the compiled schema object is built and stored in the local cache using the vocabulary id returned from the database. If you need to use a persistent metadata repository that is not a database, then you can plug in your own metadata repository. The encoder has to ensure that the binary data passed to the next client is independent of schema: that is, has inline token definitions.

BinXMLStream class represents the binary XML stream. You can set an option to create a binary XML Stream with inline token definitions before encoding. Binary XML allows for encoding and decoding of XML documents, from text to binary and binary to text. For metadata persistence, it is recommended that you use the DB Binary XML processor. The annotated DOM representation of the schema is sent to the binary XML encoder. The encoder reads the XML text using streaming SAX.

It indicates the datatype to be used for encoding the node value of the particular element or attribute. In this case, the resulting binary XML stream contains all token definitions inline and is not dependent on schema or external token sets. These token tables can be stored persistently in the database. DBBinXMLMetadataProvider object is either instantiated with a dedicated JDBC connection or a connection pool to access vocabulary information such as schema and token set. While encoding, token sets can be pushed to the repository for persistence. Binary XML vocabulary management, which includes schema management and token management.

If psvi is false then PSVI information is not included in the output binary stream. While decoding, there is no schema required. URI identification for a token table. The version number is specified as part of the system level annotations. The default is false. The XMLType class needs to be extended to support reading and writing of binary XML data. The vocabulary manager interprets these at the time of schema registration. XML with native database datatypes.

The encoder is created from the BinXMLStream. Set up the configuration information for the persistent storage: for example, root directory in the case of a file system in FileBinXMLMetadataProvider class. The BinXMLStream for reading the binary data or for writing out binary data can be created from the XMLType object. Each schema is identified by a vocabulary id. This is the simplest usage scenario for binary XML. Creating a token table of token ids and token definitions is an important compression technique. If the data is known to be completely valid with respect to a schema, the encoded binary XML stream stores this information. XML processor is an abstract term for describing a component that processes and transforms binary XML format into text and XML text into binary XML format.

If a binary stream to be decoded is associated with token tables for decoding, these are fetched from the database using the metadata connection. Binary XML makes it possible to encode and decode between XML text and compressed binary XML. XML data, but it can be used with XML data that is not based on an XML schema. The local binary XML processor contains a vocabulary manager that maintains all schemas submitted by the user for the duration of its existence. If a new schema with the same target namespace and a different schema location is registered then the existing schema definition is augmented with the new schema definitions or results in conflict error. The base class for a binary XML processor is BinXMLProcessor.

XML instance document automatically registers that schema in the local vocabulary manager. The vocabulary manager fetches the schema or token sets from the database and cache it in the local vocabulary cache for encoding and decoding purposes. Instantiate FileBinXMLMetadataProvider and plug it into the BinXMLProcessor. If the vocabulary manager does not contain the required schema, and the processor is of type binary XML DB with a valid JDBC connection, then the remote schema is fetched from the database or the metadata repository based on the vocabulary id in the binary XML stream to be decoded. It can store data and metadata together or separately. XML using pull API. The binary XML decoder takes binary XML stream as input and generates SAX Events as output, or provides a pull interface to read the decoded XML. XML stream, the binary XML decoder interacts with the vocabulary manager to extract the schema information.

If the XML text has been encoded without a schema, then it results in a token set of token definitions. To retrieve a compiled binary XML schema for encoding, the database is queried based on the schema URL. Storing noncompiled binary XML schema using the schema URL and retrieving the vocabulary id. BinXMLStream object can be created from a BinXMLProcessor factory. Encoding and decoding can happen on different clients. The vocabulary id is in the scope of the processor and is unique within the processor. You must implement the interface for communicating with this repository, BinXMLMetadataProvider. Similarly, the set of token definitions can be fetched from the database or the metadata repository. Binary XML stream encoding using schema implies at least partial validity with respect to the schema. It can also provide a cache for storing schemas.

Any document that validates with a schema is required to validate with a latest version of the schema. The vocabulary manager associated with a local binary XML processor does not provide for schema persistence. The decoder is created from the BinXMLStream; it reads binary XML from this stream and outputs SAX events or provide a pull style InfosetReader API for reading the decoded XML. The binary XML decoder converts binary XML to XML infoset. The processor is also associated with one or more data connections to access XML data. If there is no schema associated with the text XML, then integer token ids are generated for repeated items in the text XML. Every annotated schema has a version number associated with it. XML processor or repository binary XML processor. The encoding of the XML text is based on the results of the XML parsing.

This XML schema object is stored in the vocabulary cache. SQL APIs that operate on XMLType. XMLType tables and columns can be created using the new binary XML storage option. Also set a flag to indicate that the encoding results in a binary XML stream that is independent of a schema. XML is fully validated with respect to the schema. If the property for inline token definitions is set, then the token definitions are present inline.

These are specified by the user before registration. The token definitions are stored as token tables in the vocabulary cache. Register schemas locally with the local binary XML processor. Fetch the XMLType object from the output result set of the JDBC query. For decoding the binary XML schema, fetch it from the database based on the vocabulary id. If the schema is not available in the vocabulary cache, and the connection information to the server is available, then the schema is fetched from the server. By default, the token definitions is inline.

Partial validity implies no validation for unique keys, keyrefs, IDs, or IDREFs. There is no common metadata repository. The schema is fetched from the database repository for decoding. In RAW mode, retrieving binary data without specifying the BINARY BASE64 option will result in an error. You can request a schema for the resulting XML. The schema appears at the start of the data.

XML had been performed. Base64, and I tried that. The whole story goes like this. No commercial software is built for these kind of operations yet, since no standard can exist at the moment. In order to read the file I need to decompress it. The server saves data as a XML file and compresses it as binary file to reduce the size of the file. Do I need to do something extra such as change the ASCII to XML?

Do you have a link to that? What method, mechanism or software was used to do the compression? Plz help me on this. Thanks for trying to help me though. How would I do that? Michael Rys, MS: Random access and compression do relate. Also questions of random access.

Is either one of them general purpose enough to handle all mainstream XML applications? Once this is available, other areas would adopt is as well. Rick Marshall could not be present at the Workshop. Unfortunately, however, zero is not an option. Don Brutzman: binary xml is not just for wireless. Robin Berjon, Expway: with each message? Arnaud Le Hors: look at the past to predict the future. XML, with no gateway inbetween. They are final committee drafts.

Liam asking about representing entire movies in XML. Sun Microsystems position paper. Fragments need context like inscope ns declarations. Public email list is not the best way. Nokia: I have concerns with benchmark. Liam: embeding is a good usecase. Noah: a possible answer to tower of Babel. An IG is not going to come to a consensus. WG, fallback is IG for continued deliberate work towards WG. Don: people who care about this should read the process docs.

Zip will often make these bigger instead of smaller. XML used in many other cases. Code quality and maturity is a major determining factor. Liam: we could actually have a second event, where we discuss the findings. Want to specify the order of serialization. Liam: perhaps before the AC meeting in Nov or May. Robin: the svg WG is dealing with this as well. DOM and may be serialised later, but need not be. BiM is for broadcast so it was designed to do that. This workshop is part of the W3C XML Activity.

These are not in any particular order. All we need to show feasibility rather than benchmarks. XML examples in books. MPEG7 and ASN1 is already in train. Liam: we should have a forum for this dicussion. Eduardo: Total adoption may never happen. It is worth looking at, but no decidable. Stephen: we should use Wiki for collaboration.

Michael Rys, Microsoft: Yes we would reconsider then, but finding such a point is hard. Liam: are there people here who think w3c should not do further work. We need a dicussion on that. There is a heavy burden on the devices. John Schneider, AgileDelta: well done! IPR disclosure are required for WG and not for IG. Continue to work with existing parsers and tools? Removes the databinding level. We need someone from W3C listening in, figuring out where this is going.

ML deadline should be short. Work takes energy and every byte read takes work. Protocol encoding is highly based on schema implementation. We need a general purpose standard that can deal with the broad uses of XML. Mark Nottingham: Could want to do XML signing, encryption etc and for that it needs to know the element and attribute names, etc. If so, what needs to be done?

We have to be careful about finding a sweet spot. Liam: anyone would oppose a WG creation? DO BEA: So this is applicable to a part of WS, not even all of it, and you would rather do this than nothing? It is not clear to me that we would indeed be able to do that. Michael Rys, Microsoft: would need to extend the infoset to do this. This is a risk.

This may prompt people to improve their parser. Liam: anyone here thinks there should not be any further discussion? Not clear at all that standardisation work would increase fragmentation? NASA: PSVI: what is the problem exactly, 1 to 2 years down the road? Nor does battery life. Geertsen, Sun: But WS are only interested in interop with other WS? Do we go ahead? Variability in performance with fallback is less desirable than uniform performance.

Archives are helpful for mailing list. It should be only for information purposes. There are other alternatives to email. You may lose a substantial part of the web. We need a general purpose standard that can deal with mixed namespaces. Liam: I should point out that not all WG have rec deliverables. XML in our applications. Robin: but gzip is lossless.

XML encoding for human accessibility. MarkN: WG has IPR requirements and that gives me more comfort. Or cannot live with the question? Use cases, test data, benchmarks? John: should we document the objectives and deliverables for the list? Similar to a interop workshop.

Your API still has elements and attributes? We cannot compare these without a standard corpus of test files that are run on different implementations. Liam: one way to do this is to look at what happens in DB. If no existing solution works, probably no new one would either. Jim Trezzo: There could a phased adoption. W3C will effectively lose control. Robin Berjon, Expway: yes. DO BEA: So if everyone did that, BEA did it and IBM did it, are you prepared to live with someone elses standard? Web Services rather than to explore proprietary interfaces.

Essential to be clear on definitions. Carriers are not worried about interop with other xml apps. Beyond discussing this, how do you write a charter for the WG? Seem highly relevant to me. Liam: this will also result in challenging people to do better with text xml. Craig Bruce: if u take a text file and gzip it, then you have a binary file. W3C XML Schema to ASN. Liam: we seem to have two groups. Noah: Is it using Java reflection to do the classes? MarkN: but one has to go through that tool before editing it. Llopart, Sun: We are not committed to this particular solution.

We need a migration plan. Like others, I also prefer zero standards to two. There are already two mainstream standards organizations working on binary encodings for XML, MPEG7 and ASN1. View Source Principle which has helped the Web to spread. Eduardo: there already exists ISO and other standards. BiM 2 does and so does our product.

WG to figure out if we should have a WG. IPR issues, commitment requirements. Liam: consensus that w3c should do further work in this area. The more significant benefits are economic. The debate will surely happen in the AC. Anish Karmarkar, Oracle: if there is no single soluton that works for all cases, would you prefer one, or none, or multiple solutions? Carefully analyze the problem to be solved, and pick a good one. NASA: infoset can hold binary data. Table based processing has more predictability and improves performance. Your left bar is too big by a factor of 10 or so. Others have claimed that gzip is adequate.

Could I round trip through that? Llopart, Sun: This addresses the needs of our customers, and they would rather do this with a standard. This may get too competitive. So as to convince people. Oliver Goldman, Adobe: not sure, need to look at that more. Margaret Green, Ontonet: XML, or Infoset? This may be applicable to random access. In the long term, I would suggest a goal. Arnaud: Typically WG have deliverables that are rec track.

W3C standard would be very exciting for us. Liam: we can do something more or better. May seems too far to me. Clearly one can push back on boundaries. Migration is going to happen. Second point, customers say we need faster xml. XML specs, APIs, etc. Selim: we do support xml right now. MarkN: a mailing list is a horrible place to discuss a charter. Should W3C do more work in this area?

Geertsen, Sun: It can be handled, the holes do not have full performance; they can be mixed ok. But they need it anyway. We can also send incremental schema updates. Perhaps we can start with a IG and progress to a WG. Liam: in principle we can invent something like a RF IG. WG to come to a consensus on. MarkN: spend some time capturing the risks of doing this. Worst case is no worse than best case now, best case is a lot better. Llopart, Sun: This is coming from customer pressure, there is a real problem to solve.