Xslt Not Equal To Null



We have XML data in a SQL Server database that we want to search efficiently, but are not sure of the best way to get the results we want. XSLT: Check if a string is null or empty. This example creates a table of element with its attribute rollno and its child , , , and by iterating over each student. A null indicates that a variable doesn't point to any object and holds no value. The year it taken from Date1, not Date2. The columns must also have similar data types. Node-sets are cast to a Boolean True if they contain at least one node. A requirement for structured XML to be generated from a flat XML source but only XSLT 1 can be used for the transformation. XSLT processors are free to support any number of the extension elements and functions described in this document. So kann man z. Altova MapForce is a data mapping tool that is used to rearrange one. BizTalk: xpath: How to work with empty and Null elements in the Orchestration The problem is with the Empty-Null cases in the xpath expressions. XSL-FO does not currently have a function for retrieving the current date and time. 0 Emitted Code: public bool LogicalEq(string val1, string val2). The OR operator displays a record if either the first condition OR the second condition is true. This is null if this entity is not an external parsed entity. To do this, we create a variable named, null and do not assign any value to it. SQL UNION Syntax. SQL Server 2000, XML and XSL: The Ultimate Combination - Creating the stored procedure (Page 3 of 5 ) To retrieve our data as XML, we will compress our query batch into a single stored procedure. Insignificant whitespace is generally ignored in SQL statements and queries, making it easier to format SQL code for readability. var node = { value: 125, left: null, right: null }; As can be seen from the name, the binary search tree is a tree structure of the organization component layer. Solved: Hi , I am new to SAS Enterprise Guid. These cookies collect information that is used either in aggregate form to help us understand how our website is being used or how effective our marketing campaigns are, or to help us customize our website and application for you in order to enhance your experience. 0 you have 4 datatypes: number, boolean, string and nodeset. select problem with "not equal" syntax Comparison Operators Mysql Pocket Reference Using the SQL SELECT Statement with MySQL Using MySQL with Perl-----Relevant notes: At the time of writing this FAQ was ranked number 1 at Google for the terms sql, statement, using, not, equal, to and 7 for sql, not, equal. XSL Transform Result. 1 to work compatible with Java 1. 0 dialect do not necessarly exist in the ILM XPath dialect, and they do not necessarily have the exact same behavior. Accessing or modifying a null object’s field. NET In This Chapter: What Is XSLT The Transformation Process Getting Your Feet Wet with XSLT The XSLT Language XSLT Functions. the problem is when the dataset column has null value the column in xml is skipped and spoil the entire xlst transformation as the rows are pushed wrongly is there a way to check if the current column is null and replace it with 0 or hypen "-" , in the below code itself without actually specifying the column name. XSL: NOT equal checking for node?. updatexml the xsl file is stored in the database for each table This will set all table columns not in. The attribute value template is used to output the XML document data to an attribute that is not an XSLT command. A field with a NULL value is a field with no value. Here is the BI Publisher syntax for this,. 0, or it is a literal result element that has an xsl:version attribute whose value is not equal to 1. DataSpider Servista Help; XSLT Convert XSLT Structure; Message Code. 0, XQuery, Java, C++, or C# data conversion code by simply selecting the language(s) you require. the problem is when the dataset column has null value the column in xml is skipped and spoil the entire xlst transformation as the rows are pushed wrongly is there a way to check if the current column is null and replace it with 0 or hypen "-" , in the below code itself without actually specifying the column name. 80 > Greater than price>9. 80 >= Greater than or equal to price>=9. Create your own Servlet¶ This section assumes you are familiar with embedding FOP. The problem lies inside xsltParseTemplateContent (when XSLT_REFACTORED is not defined, which is the case in all standard configurations) in xslt. aspx page in SPD > "Convert to XSLT Data View"> in the “Comman Data View Tasks”, click “Filter” > in “Field Name” select your field, in “Comparison” select “Not Null”. A map also included at the very bottom. The OR operator displays a record if either the first condition OR the second condition is true. Another possibility is to use java or javascript (or perhaps some other language). POPULATION96 IS NULL. fo) doesn't change to the namespace specified in the document entity (test. This encourages code reuse strategies and is easily modifiable in the future. You can do this with the following XSL: -60 days and less than equal to 180 days will be displayed “GREEN” on the CalcuDate When the date is empty or null. This is equivalent to not occurring "on" Number: Returns a value of true if is not equal to. How to Check Null in Java. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 80 < Less than price<9. We also describe several application scenarios of output schemas. This required that all paragraph elements needed to be nested within a subsection element and all subparagraphs needed to be nested within the paragraph element. This function is not supported in. It really depends what you mean by "null or empty". File: System\Xml\Xsl\Xslt\XsltInput. no equivalent: Real Application Cluster. Re: Test to see if node with attribute exists in XML file with C# Dec 01, 2007 07:14 PM | darinsee | LINK Jos, thanks for the reply - I didn't implement exactly as you suggested ( I used SelectSingleNode ) but you definitely got me confident enough to give a few other things a try - here's what worked for me, should it be useful to anyone else. Now you want to give a condition to check the existence of the tag in the XML data. because I'm not using XSLT to much and tend to forget this syntax, this is how you can check for null values in XSLT: First creat an empty string: Then check if you're value is not equal to this empty strint:. No warranty is given for completeness, correctness and uptodateness of the content. 1954 Toronto Baseball Team Photo ELSTON HOWARD,Burlesque 4 Layers dark purple Ostrich Feather Fan Opened 67'' with Travel bag,ROMANIA 1865 PRINCE ALEXANDRU IOAN CUZA Sc 22-24 FORGERIES USED (CV2. I usually use XSLT's to do the transformation, but an IBM employee convinced me to use BO Maps instead, in this occasion. Forwards-Compatible Processing An element enables forwards-compatible mode for itself, its attributes, its descendants and their attributes if either it is an xsl:stylesheet element whose version attribute is not equal to 1. I was intrigued by Vadim Tropashko's SQL Design Patterns. Even the direct notation of an XPath method in an XSLT stylesheet will not result in any processes, when written in a location that is not an XSLT command. 4; Other Versions XmlPrime 4. Yes you´re right version 4. Checking for null in PowerShell 17 OCT 2013 • 3 mins read about powershell Updated 29 Sep 2016: Fixed a bug in IsNull where Bruno Martins pointed out it returned True for 0. In the tutorial example and in xsltproc, on which the tutorial example is based, parameters to be passed take the form of key-value pairs. I tell you that you I can get very lazy when developing applications referencing SQL Server. The XMLViewer webpart does not expose XSLT Parameter properties as do the XSLTListView and Content by Query web parts. The first item becomes the root node, and each additional value is added to the tree as the ancestor of the root. IsEmpty/IsBlank - checks if a String contains text; Trim/Strip - removes leading and trailing whitespace. " Probably far easier is to declare the null template for the unwanted. 0 mit sum() nur solche Werte summiert werden, die sich auch tatsäch­lich als Stringwerte von Nodes im Dokument befinden. Extended Function Support in RTF Templates with Exmaples: For RTF template BI Publisher has a extended set of SQL and XSL functions. Subject: Re: [saxon] Cannot write more than one result document to the same URI: null In this case means that nothing happens at all. BizTalk: xpath: How to work with empty and Null elements in the Orchestration The problem is with the Empty-Null cases in the xpath expressions. The order of nodes in the return value is not guaranteed. If either or both operands are NULL, NULL is returned. Would you please read the code an advise? Is this the proper way doing "not equal" in xslt. An element is considered empty if it does not have any content (e. versions in the project file and packages. 1; XmlPrime 3. That method returns a new string that is lowercase. NET Developers By Dan Wahlin Softcover - 484 Pages Published by Sams ISBN: 0672320398 Buy a Copy Chapter 7: Transforming XML with XSLT and ASP. Now, we can begin generating the bars that represent each answer. Description. The attribute is not passed to the output in XSLT transforms, and therefore I do a custom transform to inject the attribute. Others are welcome to do so, of course. Subject: Re: [saxon] Cannot write more than one result document to the same URI: null In this case means that nothing happens at all. Axis2 return name. Subject: Re: [xsl] Only output element when parameter value is not equal to blank (or null) From: Chris Coyle. Using XSL and XSLT. - Arithmetic operator that means "not equal to". 0, or it is a literal result element that has an xsl:version attribute whose value is not equal to 1. A binary comparison operator compares two variables or quantities. Tip: The first string is declared and the instance method ToLower is called on it. Patternist::ReportContext Class Reference to have an attribute whose namespace is either null (that is, an attribute with an unprefixed name) or the XSLT. Filtering by XSLT. Whether a value is between two provided values, or equal to one of them:. the problem is when the dataset column has null value the column in xml is skipped and spoil the entire xlst transformation as the rows are pushed wrongly is there a way to check if the current column is null and replace it with 0 or hypen "-" , in the below code itself without actually specifying the column name. A field with a NULL value is a field with no value. It is a part of OOPs interview. Bond Lee 707. The part I'm looking to exclude nulls in the below code. David Eisenberg. com I did check them by outputting them in a element. XSL References. See Section 8. In your case this should work. If you use xslt variables it's important to check for null values. We first start by showing two XML documents that can be combined into one. I tell you that you I can get very lazy when developing applications referencing SQL Server. Eagle currently has a career opportunity for a Software Developer and we are looking to speak to qualified candidates with the skills and experience outlined below. // / = And AndAlso As Eqv Imp Is Like Mod Not Or OrElse Xor \ ^ /L3"HTML" HTML_LANG Nocase Noquote Block Comment On = File Extensions = HTM HTML SHTML HTT HTA. Top 35 Linked List Interview Questions with a list of top frequently asked, Control Systems interview questions and answers, blockchain interview questions,. This makes a difference when one year is a leap year. nicht den Gesamtwert von verkauften Waren ermitteln, wenn erst. 0 maps proposal uses a syntax more like computed element constructors, introducing a constructor with a keyword, and uses := as a delimiter between name/value pairs, instead of the : delimiter used by JSON. The problem is I need to do it again but this time take in an XML String. An element from the XSL namespace may have any attribute not from the XSL namespace, provided that the expanded-name of the attribute has a non-null namespace URI. October 2, 2002. Are there 'Null' and 'not equal to' operator that I can use in xsl:if statements? means "true if the title attribute is specified" (either physically present or given as a default in the DTD/Schema) is the inequality operator I assume that there must be, but I can't figure out the syntax. Libxslt is the XSLT C library developed for the GNOME project. CSS is concerned about presentation of data, while XSLT is used for creating new documents by rearranging and filtering xml data. XSLT processors are free to support any number of the extension elements and functions described in this document. Read on Mobile Enter Reading Mode. 0 did not have explicit support for grouping so indirect and potentially confusing techniques had to be invented. Database Access Check Null; Equal; Not Equal; Less Than; Not More Than;. In this article we will go through some functions in BI Publisher with examples which may help you while dealing with Bi publisher. CSS is concerned about presentation of data, while XSLT is used for creating new documents by rearranging and filtering xml data. This offers possibly the worst performance, since all records are retrieved before they are filtered, but the greatest flexibility, because you can apply conditional rules that would be very difficult, if not impossible, using the previous techniques. not operator. Top 35 Linked List Interview Questions with a list of top frequently asked, Control Systems interview questions and answers, blockchain interview questions,. 3, this checks the validity of the inputs and will warn if invalid. Taking the length of null, as if it were an array. This chapter contains the following sections: Introducing XSL. Two booleans are equal if either both are true or both are false. Empty says "I'm an uninitialized variant," Nothing says "I'm an invalid object" and Null says "I represent a value which is not known. If one operand is a node set and the other is a boolean, it converts the nodeset to a boolean and compares the result. Many times, you may not notice that the changes you've made in XML affect how you can access the data in XML documents. GitHub Gist: instantly share code, notes, and snippets. David Eisenberg. We have XML data in a SQL Server database that we want to search efficiently, but are not sure of the best way to get the results we want. For example, you can specify that if reported numbers reach a certain threshold, they are displayed shaded in red. ” Null is not True, not False, but Null! The correct way to check for Null is much as you’d do for Empty: use IsNull (or TypeName or VarType. dll provided on codeplex. I have a custom search result in xslt. I am using sp 2010. Also, Sharepoint designer 2007 does not, using the UI, allow you to set a filter on a data form webpart and using a lookup column's ID field. Then, the field will be saved with a NULL value. Oracle Scalable Trigerless driver for User Accounts and Roles leveraging Identity Manager 3. One of the date fields is often NULL and if I leave it unchecked it inserts the value -146087 into the cell. Paul Prescod xml-dev: A list for W3C XML Developers. 0, or it is a literal result element that has an xsl:version attribute whose value is not equal to 1. Premium Derived Column Functions. How to test whether an expression is null. To investigate on XML issues or other publishing problems, often the OPP logfile is needed. Aantekening - ; XSLT - ; XSLT null-value; If you use xslt variables it's important to check for null values Monday, March 14, 2011 because I'm not using XSLT to much and tend to forget this syntax, this is how you can check for null values in XSLT:. // / = And AndAlso As Eqv Imp Is Like Mod Not Or OrElse Xor \ ^ /L3"HTML" HTML_LANG Nocase Noquote Block Comment On = File Extensions = HTM HTML SHTML HTT HTA. DWQA Questions › Category: Database › About lock table and lock row… 0 Vote Up Vote Down Qinglong Taoist asked 3 days ago Hello, everyone, I’ve heard the words about lock table and lock line all the time, but after checking some information on the Internet, I feel confused. Download a FREE 30-day trial today!. This example servlet should not be used on a public web server connected to the Internet as it does not contain any measures to prevent Denial-of-Service-Attacks. If you want a test that succeeds if categoryName is either absent, or present with a zero-length value, you should use test="not(categoryName = '')". I've only got a draft of the 2003 standard, but that sais:. When compiling the stylesheet attached, libxslt crashes. com/ Explanation : In the above example visitSequence is checked for no existence (or) if it exists if its length is zero. You are painting an image with the Brush tool. Using XSL and XSLT. Luckily, there is a way to escape curly brackets in XML so that XSLT does not try to evaluate them and that is by using double curly brackets. Accessing or modifying a null object’s field. If result in 'How to repeat' is alright this means that unique key constraints on more than one column are dangerous. Comparing XSLT and XQuery. Here is the BI Publisher syntax for this,. Otherwise, it refers to an extension element. 1 to work compatible with Java 1. For example, you can specify that if reported numbers reach a certain threshold, they are displayed shaded in red. That is, the namespace of the block in the external entity (testseg. However, an XSLT processor must not claim to support EXSLT 1. This document is an informal guide to the syntax of XPath 2. Privacy & Cookies: This site uses cookies. var node = { value: 125, left: null, right: null }; As can be seen from the name, the binary search tree is a tree structure of the organization component layer. NET In This Chapter: What Is XSLT The Transformation Process Getting Your Feet Wet with XSLT The XSLT Language XSLT Functions. You can use its XSL parser to then render HTML using XSL's various capabilities (string manipulation, math functions, conditional logic, etc. Axis2 return name. XPath Operators. Posted on September 16, 2011. setParameter() which cannot be converted to a XPath object are now accepted as external objects in the sense defined by the XSLT1. Description. I have a Parent Node that represents a Menu and all the childnodes of Menu are "Menu Items". Turns out the problem was the curly brackets {and } because XSLT attempts to evaluate statements inside curly brackets and the XSLT did not contain a todaysDate() function. Supported technologies include XML Schema, DTD, Relax NG, XSLT, XPath, XQuery, CSS. In the tutorial example and in xsltproc, on which the tutorial example is based, parameters to be passed take the form of key-value pairs. DWQA Questions › Category: Database › About lock table and lock row… 0 Vote Up Vote Down Qinglong Taoist asked 3 days ago Hello, everyone, I’ve heard the words about lock table and lock line all the time, but after checking some information on the Internet, I feel confused. Now you want to give a condition to check the existence of the tag in the XML data. After this, the list view will display the items when this column is not null. Home › MoonCraft Forums › Server Announcements › how to write not equal sql query This topic contains 0 replies, has 1 voice, and was last updated by JerodLig 4 days, 8 hours ago. 0 that require strings to be ordered rely on the concept of a named collation. A binary comparison operator compares two variables or quantities. 1 u se the old schema and from version 4. Home; XML; CSS Style; SVG; XML Schema; XQuery; XSLT stylesheet; if statement with and operator : if. When the xsl:version attribute is not equal to 1. 80 >= Greater than or equal to price>=9. END; / NULLS NOT EQUAL ZLS NOT EQUAL ZLS/NULL NOT EQUAL I understand the first test would be NOT EQUAL because you need. A requirement for structured XML to be generated from a flat XML source but only XSLT 1 can be used for the transformation. NET Classes Involved in Transforming XML Creating a […]. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field. The base requirement with this approach is that both documents are similar with the exception of one Element that contains some unique information that is not contained on the other XML. SSIS: Using Lookup to not only find records, but add them too Posted on November 30, 2012 by Russ One of the things that I like about providing training is the kind of questions that come up. > > Can you tell me what kind of another problem i may run into ?. 5 Forwards-Compatible Processing]). Hundreds of reusable examples of XSLT functions from the FunctX XSLT Function Library. You have been warned!. Accessing or modifying a null object’s field. I'll cover the following topics in the code samples below: Xslt, Xml, Example Finaly, Xml Xslt, and Attribute. 5 and newer. The conditional formatting that you specify can be XSL or XSL:FO code, or you can specify actual RTF objects such as a table or data. 0 proposal does not. For example, to find cities whose 1996 population has not been entered, you can use. 80 >= Greater than or equal to price>=9. The file format, as it is used in Microsoft Excel, has become a pseudo standard throughout the industry, even among non-Microsoft platforms. For many XSLT transformations, the result tree may not be XML, and this message can simply be ignored. 80 <= Less than or equal to price<=9. It is easy to simply reference the table or use "Select * from. If either or both operands are NULL, NULL is returned. You can filter the list view using SharePoint Designer, Open your list AllItem. XSLT processors are free to support any number of the extension elements and functions described in this document. Download a FREE 30-day trial today!. 0, or it is a literal result element that does not. For example, to find cities whose 1996 population has not been entered, you can use. This AppNote includes a step-by-step approach on how to adapt the Identity Manager JDBC driver example provided on the Oracle media. Language elements. For example, you can present different content only if a given condition is met. Efficient sorting is important for optimizing the use of other algorithms (such as search and merge algorithms) which require input data to be in sorted lists; it is also often useful for. SSIS: Using Lookup to not only find records, but add them too Posted on November 30, 2012 by Russ One of the things that I like about providing training is the kind of questions that come up. Hi I have a problem while creating an Excel XML document using XSLT. Home Page › Forums › BizTalk 2004 - BizTalk 2010 › How to set a default value to an destination schema element in BizTalk Map This topic contains 9 replies, has 1 voice, and was last updated by community-content 1 year, 3 months ago. I have the values from the list but I want to ignore the null values, how to do that. berxblog Donnerstag, 24. The element inserts a text string representing the value of the first element (in document order) specified by the select attribute. If the XML Path Language (XPath) expression returns more than a single node, the element returns the text of the first node returned (equivalent to the XMLDOMNode object's selectSingleNode method). When I started working in database programming and complex business implementations, the need for a data access framework was definitive. Soham Patel's Blogs. The last technique is done on the "client-side", through XSLT. User attention is requested. This provides some additional functions for working with Dates and to a certain extent Times. c lines 4949-4956:. Filtering by XSLT. It is provided as an example and as a starting point for your own servlet. Taking the length of null, as if it were an array. The stylesheet below uses an extension element and an extension function to transform an element in the XML source into a statement in the output indicating the date by which a customer can expect a response to a given enquiry. I would like to check if "srportalurl" is not empty before show a ahref. A note on the GUIDs. WebKit is an engineering project not a science project. It therefore makes sense to xslt stylesheet authors to define extension functions using XSLT - the implementation may not be as efficient as it would be in, xslt, Java, but at least it can be function across platforms function implementations, and limits the number of langauges that stylesheet authors have to custom. XSLT has been the main XML technology for transformations for some time now, but it’s not the only player in the game. One possibility is to use the exslt date and time extension. SP limits use to XSLT 1. This required that all paragraph elements needed to be nested within a subsection element and all subparagraphs needed to be nested within the paragraph element. Premium Derived Column Documentation integer that is greater than or equal to «numeric based on whether «expression» is null. 0 mit sum() nur solche Werte summiert werden, die sich auch tatsäch­lich als Stringwerte von Nodes im Dokument befinden. 1; XmlPrime 4. An element enables forwards-compatible mode for itself, its attributes, its descendants and their attributes if either it is an xsl:stylesheet element whose version attribute is not equal to 1. XSLT does not require support for any programming language. selector }} no results. Java binding:. This example creates a table of element with its attribute rollno and its child , , , and by iterating over each student. It is not possible to manipulate the javax. GetAttributes(forEachAttributes); string select = ParseStringAttribute(0, "select"); // The current template rule becomes null, so we must not allow xsl:apply-import's within this element input. Filtering by XSLT. A boolean is always true except when it has value 0 (or keyword false). A field with a NULL value is a field with no value. are not "equal," although they may appear so to a casual human observer; the second item1 is preceded and followed by newlines. Using Oracle JDeveloper 10g XSQL Servlet tool you can create XSQL pages. If one operand is a node set and the other is a string or number, it tests whether there is a value in the node set that is equal (or not equal) to the other operand. To investigate on XML issues or other publishing problems, often the OPP logfile is needed. When compiling the stylesheet attached, libxslt crashes. 0 dialect do not necessarly exist in the ILM XPath dialect, and they do not necessarily have the exact same behavior. In case this feature is accepted to be included in Django, feel free to assign it to me: I'm willing to take on creating the patch, its documentation and testing. They are similar to university courses, but do not tend to offer academic credit. > I am trying to determine if a node > is empty > To test whether the string-value of the node is (not) an empty string, use To test whether the node has no children, use It all depends on your definition of "empty", e. Don't be thrown off by the equals (=) sign when testing criteria as a formula. XmlPrime 2. how to check value of attribute is null in xslt code how to check value of attribute is null or not in xslt code 28-Oct-19 10:39 PM?. Implicit and Explicit Type Conversions C# will automatically convert some types for us if the following two conditions are true: 1. We need to find specific values in certain XML nodes- this will involve finding node values that match given substrings. ) Following are the steps to create a blank Data View. This was used to extract the html from a blogger feed which was used across http://griffmonster-walks. 0 defines a feature called streamability: a technique to write xslt code that is able to handle arbitrary sized inputs. XSLT: Check if a string is null or empty. Googling a bit I did manage to put something together that worked till my boss told me that "Tables and columns must be build dynamically into the xslt document. It is provided as an example and as a starting point for your own servlet. Look at the following code, it shows the AVG function ignores the records which their specific column has NULL value. " Probably far easier is to declare the null template for the unwanted. 300 Java Interview Questions | Set 2 with assurance of 90% core java interview questions, let's see abstraction interview question. Whether a value is between two provided values, or equal to one of them:. config file. You can't as such: XML isn't a programming language, so you can't say things like bar But you can have conditional criteria in a Schema, DTD, or a processor, and some DTDs provide attributes for conditional processing. 1; XmlPrime 3. 0 that require strings to be ordered rely on the concept of a named collation. The list of tutorials related to oXygen XML Editor. Now you want to give a condition to check the existence of the tag in the XML data. Heresy! CSS is the XML stylesheet language that's available and useful *today*. config are equal. XSLT: Check if a string is null or empty. That method returns a new string that is lowercase. Posted on September 16, 2011. The XSLT element allows you to perform conditional statements against the contents of your XML document. Date1: 1-Jan-2007. 0+ Office 365's server distribution model negates many of the caching benefits seen in on premises versions (although still fast, large datasets and complicated transforms suffer from more performance issues in the cloud). XSL stands for EXtensible Stylesheet Language. Null is commonly used to denote or verify the non-existence. GitHub Gist: instantly share code, notes, and snippets. Comparing XSLT and XQuery. XmlPrime 2. Taking the length of null, as if it were an array. 80 < Less than price<9. sai src/org/web3d/x3d/sai build/org/web3d/x3d/sai org. 28 creative writing exercises and prompts functions defined using exsl: Calling extension functions custom this way causes arguments to be passed by position. I would like to check if "srportalurl" is not empty before show a ahref. Search: Just another WordPress. Reference is replaced with PackageReference version in the project file is not equal to version in the packages. October 2, 2002. We’ll create a cross-browser stylesheet switcher that remembers the user’s preferences, touching on php variables, cookies, if statements, and including pages with require_once. Regards, Ramsey. Note: The the way primary and secondary datafiles are mapped in SQL Server does not relate to how data files are mapped in Oracle. 1 This small post describes the process for upgrading xalan - java version to 2. _____ Emperor. Heresy! CSS is the XML stylesheet language that's available and useful *today*. The expression IS DOCUMENT returns true if the argument XML value is a proper XML document, false if it is not (that is, it is a content fragment), or null if the argument is null. XSLT is easily confused with Cascading Style Sheets (CSS).