Concat expression Collection T

Hi all,
I have a mapping in my entity, one to many mapping, example relationship "1 question -> many answers"
so, in Question class, i can access a collection of "Answers"; But in my criteria query, i need to concat all "Answers' summary" for sorting purpose. ("summary" is a field in Answer class)
I can get:
Expression<Collection<T>> e = root.get("answers") but i don't know how to create sorting criteria for concatenation of all summary that an answer has.
I have googled around, but i haven't found a way to do it.
thank you for your help
regards,
-Hoang Long
Edited by: CardM on Aug 7, 2012 7:34 PM

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PeopleCode :: Query API :: Query Expression collection problems

Hi all,
I'm trying to use the Query API in PeopleCode to tack on an expression to the end of an existing query. Thus far I have been successful doing just a QueryField without any problems. Here is some example code of what I have done with the Query Expression collection and where I am stuck:
&Criteria = &MainQrySel.AddCriteria("criteria1");
&Criteria.Logical = %Query_CombAnd;
&Criteria.Expr1Type = %Query_Expression;
&crit = &Criteria.AddExpr1Expression();
&Criteria.Expr1Expression = &crit;
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Well, I finally discovered he solution on my own, by reverse-engineering Oracle's own search.jsp (which does not use Oracle's custom tag library, btw) (probably because same doesn't really work, or at least it doesn't what's in the documentation doesn't work) (which isn't surprising).
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What is the cause of the XPath error in concat expression

Hi,
In a BPEL process I am working on I am building a list as follows -
<copy>
<from expression="concat(bpws:getVariableData('FMSNumbersList'),' | ',bpws:getVariableData('Invoke_1_GetFmsHeadersSelect_OutputVariable','FmsWaveAssignCollection','/ns5:FmsWaveAssignCollection/ns5:FmsWaveAssign/ns5:fmsHeadersCollection/ns5:FmsHeaders[bpws:getVariableData('FmsHeadersProcessed')]/ns5:fmsNumber'))"/>
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</copy>
When I compile the project I get the following error -
Error(195): invalid xpath expression
xpath expression "concat(bpws:getVariableData('FMSNumbersList'),' | ',bpws:getVariableData('Invoke_1_GetFmsHeadersSelect_OutputVariable','FmsWaveAssignCollection','/ns5:FmsWaveAssignCollection/ns5:FmsWaveAssign/ns5:fmsHeadersCollection/ns5:FmsHeaders[bpws:getVariableData('FmsHeadersProcessed')]/ns5:fmsNumber'))" specified in <from> is not valid, because XPath query syntax error.
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The XPath query syntax was wrong; the exception was: Expected: ).
Check the detailed root cause described in the exception message text and verify that the XPath expression named in the error message is correct. The XPath expression is defined in the BPEL process.
Make sure the expression is valid
I am unable to figure out what is wrong with the above expression. Can someone please help.
Thanks in advance
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You have to use two copy statement to fetch values like an Array.
1. Construct a dynamic xpath expression
2. Use dynmaic xpath to get the array value
Eg:
The below code shows how to use assign to build the dynamic XPath.
<assign name="Assign_XPath_For_Array">
<copy>
<from expression="concat('/ns1:ArrayList/ns2:ArrayElem[',bpws:getVariableData('Variable_Index_Counter'),']') "/>
<to variable="Variable_Xpath"/>
</copy>
</assing>
Note have used [index] to represent index element here in the array.
Here Variable_Xpath acts as a temporary string variable that holds the intermediate Xpath as string.
Now use this XPath string Variable while reading array index elements.
This would look like
<assign name="Assign_Read_Array">
<copy>
<from expression="bpws:getVariableData('Variable_Array','payload',bpws:getVariableData('Variable_Xpath'))"/>
<to variable="Variable_Read_Array_Element"
query="/ns1: ABC"/>
</copy>
</assign>
--Prasanna

Looping through Collection

Hello I need to loop through the collection to process 500 records at a time from the resultset.
how do i do this?
I have created another variable of same type as resultset output variable type. but not sure how to assign nodes 1 to 1000 to the new variable.

Hi,
You can loop over your collection with a while loop. The following is from the bpel samples directory (112.Arrays) adapted to your needs. Define the variables:
<variable name="iterator" type="xsd:integer"/>
<variable name="count" type="xsd:integer"/>
<variable name="xpath" type="xsd:string"/>
Set the initial values:
<assign name="SetInitialValues">
<copy>
<from expression="1"/>
<to variable="iterator"/>
</copy>
<copy>
<from expression="ora:countNodes('input', 'payload','/tns:collection/tns:item')"/>
<to variable="count"/>
</copy>
</assign>
Make a while loop:
<while condition=" bpws:getVariableData('count') >= bpws:getVariableData('iterator')">
<sequence>
<assign name="setAttribute">
<copy>
<from expression="concat('/tns:collection/tns:item[',bpws:getVariableData('iterator'),']/tns:value')"/>
<to variable="xpath"/>
</copy>
<copy>
<from expression="bpws:getVariableData('input','payload',bpws:getVariableData('xpath'))/>
<to variable="output" part="payload" query="/tns:recordVariable/tns:value"/>
</copy>

<copy>
<from expression="bpws:getVariableData('iterator') + 1"/>
<to variable="iterator"/>
</copy>
</assign>
</sequence>
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Kind Regards,
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Expression and "end with"

Hi,
Using expression, i'm trying to build an expression that use a field as a like criteria. It a kind of reverse "like" SQL function. I have entity "reference" with à refcode field and some record that look like :
Id refcode
1 123
2 BLA
3 BLA1
I would like to get one of this record depending request arguement that I call "code". It look like that :
If I want record that match the begin of the "code" BLA1TEST1, it will return entity Id 2 and 3. So It look like :
ExpressionBuilder eb = new ExpressionBuilder();
Expression e1 = eb.get("refcode").concat('%')
Expression expr = eb.getParameter("code").like(e1)
Query query.addArguement("BLA1TEST1");
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If I want record that match "contain" of the "code" ESSBLA123", it will return entity Id 1 and 2 and 3. And it look like :
ExpressionBuilder eb = new ExpressionBuilder();
Expression e1 = eb.get("refcode")
Expression expr = eb.getParameter("code").containsSubstring(e1)
Query query.addArguement("ESSBLA123");
work too.
But if I want record that match the end of the "code" BL123, that may return entity Id 1, I don't kown howto ?
Thanks for your help.
Note : I get the result with JPQL like this :
For begin with :
String asql = String.format ("SELECT a.id FROM Reference a WHERE '%s' LIKE concat(a.refCode,'%%')", code);
Query sq = em.createQuery (asql, Reference.class);
For end with :
String asql = String.format ("SELECT a.id FROM Reference a WHERE '%s' LIKE concat('%%', a.refCode)", code);
For contain :
String asql = String.format ("SELECT a.id FROM Reference a WHERE '%s' LIKE concat('%%', a.refCode, '%%')", code);
Edited by: user11112980 on 6 oct. 2011 03:44
Edited by: user11112980 on 6 oct. 2011 04:57

Hello,
I assume the problem is with creating an expression equivalent to "SELECT a.id FROM Reference a WHERE '%s' LIKE concat('%%', a.refCode)"? If so you can use a literal:
ExpressionBuilder eb = new ExpressionBuilder();
Expression e1 = eb.literal('%').concat(eb.get("refcode"));
Expression expr = eb.getParameter("code").like(e1)
Query query.addArguement("BL123");
Or it might be more accurate to use a constant:
ExpressionBuilder eb = new ExpressionBuilder();
Expression e1 = (new ConstantExpression('%', eb)).concat(eb.get("refcode"));
Best Regards,
Chris

Express suddenly stopped extending network?

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http://support.apple.com/kb/HT4260
This should help you.

Unable to bring up expression editor for Assign component 's source node

Hi All,
I am a beginner in BPEL and trying to create a simple hello world BPEL process in my JDev 11.1.1.5.0
The screenshots in external tutorial does not match the Assign component window.
I started a new asynchronous SOA BPEL composite and then dragged an assign component in the middle of the recieveInput and callbackClient. Now I double clicked the Assign1 icon and get the "copy Rules" tab but I do not see any LOV in the top left which would have "expression" as a value as I want to concatenate the input string with "hello". I see a "Fx Calculator Icon" which I am supposed to drag to the target node but I can not drag it to the input node. Isn't possible to write an expression to the source node ?

Hi,
the assign activity changes a little bit between the versions of the JDeveloper. But we can figure it out, if you want to concatenate the input variable element and assign to the element of Output variable, what you can do is, drop an expression builder on the element of the output variable; then inside that expression builder you can use concat xpath function.
I beleieve in 11.1.1.3 version, if you want to append and assign to a target variable; we need to drop an assign activity, select copy operation; then select the expression as Type and write the concat expression in that window and on the right hand side, we need to select the variable for whome you want to assign the concatanated value.
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How 2 better build this Expression?

As you can see in the code below a null means don't use this object in the criteria. Conditionally building an Expression like this is rather cumbersome. There has got to be a better way to do this!
ExpressionBuilder builder = new ExpressionBuilder();
Expression expression = null;
if (name != null) {
expression = builder.get("name").equal(name);
if (age != null) {
if (expression == null) {
expression = builder.get("age").equal(age);
else {
expression = expression.and(builder.get("age").equal(age));
Collection persons = null;
if (expression == null) {
session.readAllObjects(Person.class);
else {
session.readAllObjects(Person.class, expression);

One thing that may help is that expression.and will allow you to pass in null (just returns the expression).
So...>>
ExpressionBuilder builder = new ExpressionBuilder();
Expression expression = null;
if (name != null) {
expression = builder.get("name").equal(name);
if (age != null) {
expression = (builder.get("age").equal(age)).and(expression);
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How to retrieve a part of XML document

Dear Everyone
I am using
Oracle: Berkeley DB XML 2.4.16: (October 21, 2008)
Berkeley DB 4.6.21: (September 27, 2007)
with python api on mac OSX.
I want to copy a part of XML document within the document.
For example, assume that we have the following XML in dbxml.
<A>

<C>hello</C>
<D>hi</D>

</A>
I want to copy with different "id" like,
<A>

<C>hello</C>
<D>hi</D>


<C>hello</C>
<D>hi</D>

</A>
How can I do this?
One more question. I want to retrieve a part of XML as string.
For example,
I want to have a string ' <C>hello</C><D>hi</D>'
How can I do this?
Thank you very much for your kind help in advance.
Best regards,
-Yoshi

Hi,
I couldn't add a document like you described:
dbxml
dbxml> createC test.dbxml
dbxml> putD "mydoc" "<C>hello</C><D>hi</D>" "s"
stdin:5: putDocument failed, Error: Error: XML Indexer: Fatal Parse error in document at line 1, char 13. Parser message: Expected comment or processing instruction (Document: mydoc)
but, if I fix it and make it well formed it worked, so for
the experiment I did that:
dbxml> putD "mydoc" "<mydoc><C>hello</C><D>hi</D></mydoc>" "s"
Document added, name = mydoc
I could have added as two separate documents, document 1: <C>hello</C>,
document 2: <D>hi</D>, but, I don't know what you are trying to do, so
I'll stick with this example to the first.
Then I ran a query to show what you did:
dbxml> query 'collection("test.dbxml")/mydoc/*'
2 objects returned for eager expression 'collection("test.dbxml")/mydoc/*'
dbxml> print
<C>hello</C>
<D>hi</D>
I can do the same thing using a query that returns something:
dbxml> query 'for $i in collection("test.dbxml")/mydoc/* return $i'
2 objects returned for eager expression 'for $i in collection("test.dbxml")/mydoc/* return $i'
dbxml> print
<C>hello</C>
<D>hi</D>
This duplicates, but the wrong way:
dbxml> query 'for $i in collection("test.dbxml")/mydoc/* return ($i,$i)'
4 objects returned for eager expression 'for $i in collection("test.dbxml")/mydoc/* return ($i,$i)'
dbxml> print
<C>hello</C>
<C>hello</C>
<D>hi</D>
<D>hi</D>
dbxml> query 'for $j in (1,2) for $i in collection("test.dbxml")/mydoc/* return $i'
4 objects returned for eager expression 'for $j in (1,2) for $i in collection("test.dbxml")/mydoc/* return $i'
dbxml> print
<C>hello</C>
<D>hi</D>
<C>hello</C>
<D>hi</D>
And, finally, for your last string example:
dbxml> query 'for $i in collection("test.dbxml")/mydoc/C for $j in collection("test.dbxml")/mydoc/D return concat("<C>",$i,"</C>", "<D>", $j, "</D>")'
1 objects returned for eager expression 'for $i in collection("test.dbxml")/mydoc/C for $j in collection("test.dbxml")/mydoc/D return concat("<C>",$i,"</C>", "<D>", $j, "</D>")'
dbxml> print
<C>hello</C><D>hi</D>
I don't get the 'id' change though.
I hope this helps.
-g

How to pass a string variable in a single quote

Hi,
I am trying to pass a single quoted string, 'some string', into a concat expression.
My situation is some thing like
I have an array of states
<copy>
<from>
<ListOfValues xmlns="http://tbone.coi.test/amis">

<Value>A</Value>
<Value>B</Value>
<Value>C</Value>
</ListOfValues></from>
<to variable="StateList"/>
</copy>
then I loop through the StateList array to get each state as
<copy>
<from variable="StateList" query="/tns:ListOfValues/tns:Value[bpws:getVariableData('iterator')]"></from>
<to variable="currentState"/>
</copy>
I then build an xpath expression like:
<copy>
<from expression="concat('/nsxml0:GetSummariesResponse/nsxml1:Summaries[nsxml1:State = ',bpws:getVariableData('currentState'), ']')"></from>
<to variable="xpath"/>
</copy>
As the result, my xpath look like:
/nsxml0:GetSummariesResponse/nsxml1:Summaries[nsxml1:State = A]
but I need a state surrounded by single quote as 'A' or xpath query like
/nsxml0:GetSummariesResponse/nsxml1:Summaries[nsxml1:State = 'A']
Any ideas how can I single quote a value of bpws:getVariableData('currentState') in my concat expression
Thanks,
-V

Have you tried 'the string contain''s an ''?

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Hi Fredrik,
At any one time, SCX can return 500 matching lines. If you're trying to return > 500 matching lines, then SCX will throttle your limit to 500 lines (that is, it'll return 500 lines, note where it left off, and pick up where it left off next time log files
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But as I said, this is only useful if you're certain that your regular expression is matching < 500 lines. If you are matching more than this, this is a known restriction today. But with an RFC, even that could at least be evaluated to see exactly the
load > 500 matches will have on the management server.
/Jeff

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Hello,
the issue is that when I make the query the objects returned are 0.
The registries are like this:
<Invoice
xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"
xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2"
xmlns:udt="urn:un:unece:uncefact:data:specification:Unqualifi
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xmlns:qdt="urn:oasis:names:specification:ubl:schema:xsd:QualifiedDatatypes-2"
xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">
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<cbc:ProfileID>urn:invinet:profile:solofac-1.0</cbc:ProfileID>
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<cbc:IssueDate>2007-04-01</cbc:IssueDate>
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"urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"
And the query is, for example:
dbxml> query 'collection("invoices1.dbxml")/Invoice/cbc:ID'
0 objects returned for eager expression 'collection("invoices1.dbxml")/Invoice/cbc:ID'
This example, without the 'cbc' namespace, works correctly.
Thanks.

Hi,
I just tried this on my system using version 2.3.10 creating a default container in the shell (IN).
Here is what I got:
dbxml> query 'collection("forum1")/Invoice/cbc:ID'
Query - Starting query execution
Query - forum1 - U : [1] 2
Query - Finished query execution, time taken = 23.747ms
1 objects returned for eager expression 'collection("forum1")/Invoice/cbc:ID'
dbxml> print
<cbc:ID xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2">0-2007</cbc:ID>
Did the setNamespace report any errors? Are you using the current version?
Ron

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I’ve added a clause to show only one of the selected layerSets at a copy and leave the rest of the layers’ visibility unchanged … maybe it works for Your purpose:
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dlg.layerName = dlg.add('panel', [290,180,410,270], "layer-name");
dlg.layerName.doAddName = dlg.layerName.add('radiobutton', [11,20,120,40], "add it");
dlg.layerName.dontAddName = dlg.layerName.add('radiobutton', [11,45,120,65], "don’t add it");
dlg.layerName.doAddName.value = true;
// field to select target-folder;
dlg.target = dlg.add('panel', [290,285,410,475], "target-folder");
dlg.target.folderPerSet = dlg.target.add('checkbox', [11,20,100,40], "folder each");
dlg.target.targetSel = dlg.target.add('button', [11,50,100,70], "select");
dlg.target.targetField = dlg.target.add('statictext', [11,80,100,185], String(myPath), {multiline:true});
dlg.target.targetSel.onClick = function () {
var target = Folder.selectDialog("select a target folder");
dlg.target.targetField.text = target.fsName
// ok- and cancel-buttons;
dlg.buildBtn = dlg.add('button', [220,490,410,505], 'OK', {name:'ok'});
dlg.cancelBtn = dlg.add('button', [21,490,210,505], 'Cancel', {name:'cancel'});
dlg.warning = dlg.add('statictext', [21,520,410,560], "be advised: existing files of the same name will be replaced without prompting", {multiline: true});
dlg.center();
var myReturn = dlg.show ();
// in case of OK;
if (myReturn == true && dlg.layerRange.layersList.selection.length > 0) {
// get the number instead of the name;
var theLayerSelection = new Array;
var theColl = dlg.layerRange.layersList.items;
for (var p = 0; p < dlg.layerRange.layersList.items.length; p++) {
if (dlg.layerRange.layersList.items[p].selected == true) {
theLayerSelection = theLayerSelection.concat(p);
// collect the rest of the variables,
var theSuffix = dlg.suffix.suffixText.text;
var theNumber = Number (dlg.number.startNumber.text) - 1;
var theLayerNameAdd = dlg.layerName.doAddName.value;
var theDestination = dlg.target.targetField.text;
var theNumbering = dlg.number.addNumber.value;
var folderEach = dlg.target.folderPerSet.value;
// save for web options;
var webOptions = new ExportOptionsSaveForWeb();
webOptions.format = SaveDocumentType.JPEG;
webOptions.includeProfile = false;
webOptions.interlaced = 0;
webOptions.optimized = true;
webOptions.quality = 80;
// history state;
var historyState = myDocument.activeHistoryState;
// create the pdf-name;
if (theSuffix.length > 0) {
var aSuffix = "_" + theSuffix
else {
var aSuffix = ""
// do the operation;
for (var m = theLayerSelection.length - 1; m >= 0; m--) {
var theLayer = theLayerSets[theLayerSelection[m]];
theLayer.visible = true;
// numbers;
if (theNumbering == true) {
theNumber = bufferNumberWithZeros((Number (theNumber) + 1), 2);
theNumberString = "_" + theNumber
else {
theNumberString = ""
// get the layername for the pdf-name;
if (theLayerNameAdd == true) {
var aLayerName = "_" + theLayer.name.replace("/", "_")
else {
var aLayerName = ""
// hide other layers;
for (var n = theLayerSelection.length - 1; n >= 0; n--) {
var aLayer = theLayerSets[theLayerSelection[n]];
if (aLayer != theLayer && aLayer.visible == true) {
aLayer.visible = false
// create the individual folders;
if (folderEach == true) {
var aFolder = new Folder (theDestination+"/"+(theLayer.name.replace("/", "_"))).create();
var theDestination2 = theDestination+"/"+(theLayer.name.replace("/", "_"))
else {theDestination2 = theDestination};
// hide the llast added layer;
myDocument.exportDocument(new File(theDestination2+"/"+myDocName+aSuffix+aLayerName+theNumberString+".jpg"), ExportType.SAVEFORWEB, webOptions);
myDocument.activeHistoryState = historyState;
else {alert ("no document open")};
////// buffer number with zeros //////
function bufferNumberWithZeros (number, places) {
var theNumberString = String(number);
for (var o = 0; o < (places - String(number).length); o++) {
theNumberString = String("0" + theNumberString)
return theNumberString
////// function collect all layersets //////
function collectLayerSets (theParent) {
if (!allLayerSets) {
var allLayerSets = new Array}
else {};
for (var m = theParent.layers.length - 1; m >= 0;m--) {
var theLayer = theParent.layers[m];
// apply the function to layersets;
if (theLayer.typename == "ArtLayer") {
// allLayerSets = allLayerSets.concat(theLayer)
else {
// this line includes the layer groups;
allLayerSets = allLayerSets.concat(theLayer);
allLayerSets = allLayerSets.concat(collectLayerSets(theLayer))
return allLayerSets

DBXML query help

Hi,
I am learning Berkeley DBXML using the command line interface. I figured out how to create a container and print out the full document. But, how do I print out only a section of the document?
This is how I create the container:
createContainer md9db.dbxml d validate
openContainer md9db.dbxml
addAlias md9db
setNamespace "dif" "http://xxx.xxx.xxx/Aboutus/xml/dif/"
putDocument entry5 xml_difs/dif5.xml f
putDocument entry6 xml_difs/dif6.xml f
putDocument entry7 xml_difs/dif7.xml f
putDocument entry8 xml_difs/dif8.xml f
query collection("md9db")/*[contains(dif:Entry_ID,"")]
What I don't understand is how to get only a section of the document to print.
For example, this query returns empty list:
dbxml> query collection("md9db")/dif/Entry_ID
0 objects returned for eager expression 'collection("md9db")/dif/Entry_ID'
And this query returns empty string.
dbxml> query collection("md9db")/string(dif:Entry_ID)
4 objects returned for eager expression 'collection("md9db")/string(dif:Entry_ID)'
dbxml> print
dbxml>
Is there any other setting I need to add to my container?
Thanks,
Rosy

Hi Rosy,
query
collection("md9db")/*[contains(dif:Entry_ID,"")]You can put { curly braces } around your query, this eliminates the need to getridofallspaces.
In the shell, the container you've last opened can be addressed using collection(), without resorting to aliasing, which on the other hand is very useful and good to know about.
Note that your above query is just an inefficient version of collection()/*/dif:Entry_ID. You're testing for the presence of dif:Entry_ID, which is sufficient; contains( some_node, "") will always return true for strings.
What I don't understand is how to get only a section
of the document to print.
For example, this query returns empty list:
dbxml> query collection("md9db")/dif/Entry_ID
0 objects returned for eager expression
'collection("md9db")/dif/Entry_ID'Now take a look at your expression - maybe you were thinking dif:Entry_ID but typing dif/Entry_ID?
It may also be useful to use collection()/*, which matches all top level element nodes, regardless of name.
And this query returns empty string.
dbxml> query
collection("md9db")/string(dif:Entry_ID)
4 objects returned for eager expression
'collection("md9db")/string(dif:Entry_ID)'We can't see your documents, so we don't know whether or not this is correct. I'd say it probably is. Maybe there are no text nodes in your documents, because all text they contain is in attribute nodes?
Michael Ludwig

Concat expression Collection T

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