外部 dtd 验证错误：XML 解析错误

Question

我已经尝试了所有我能想到的来回和前进，我一遍又一遍地计算并重新计算了我的 lt 和 gt，但是这个外部 dtd 文件一直因以下消息而无效：“XML Parsing error @line 30 (the包含“]>”的最后一行）：需要开始标记，未找到“

<?xml version="1.0"?>
<!DOCTYPE items 
[
<!ELEMENT items (item+)>
<!ELEMENT item     (description, country, sellingPrice, cost, quantityOnHand, 
                    backorderedAmount, dateLastReceived, quantitySoldYearToDate, 
                    warehouseSection, warehouseShelve, remarks, supplier, supplier+)>
<!ATTLIST item itemNumber ID #REQUIRED>     
<!ELEMENT description  (#PCDATA)>
<!ELEMENT country    (#PCDATA)>
<!ELEMENT sellingPrice      (#PCDATA)>
<!ATTLIST sellingPrice saleItem (Y|N) #REQUIRED>    
<!ELEMENT cost  (#PCDATA)>
<!ELEMENT quantityOnHand (#PCDATA)>
<!ELEMENT backorderedAmount (#PCDATA)>
<!ATTLIST backorderedAmount dateOrdered NMTOKEN #IMPLIED>   
<!ELEMENT dateLastReceived   (month, day, year)>
<!ELEMENT month  (#PCDATA)>
<!ELEMENT day  (#PCDATA)>
<!ELEMENT year  (#PCDATA)>
<!ELEMENT quantitySoldYearToDate    (#PCDATA)>
<!ELEMENT warehouseSection (#PCDATA)>
<!ELEMENT warehouseShelve     (#PCDATA)>
<!ELEMENT remarks     (#PCDATA)>
<!ELEMENT supplier       (number, shipmentLeadTime, supCost)>
<!ELEMENT number  (#PCDATA)>
<!ELEMENT shipmentLeadTime  (#PCDATA)>
<!ATTLIST shipmentLeadTime unit (days|weeks) #REQUIRED>
<!ELEMENT supCost  (#PCDATA)>
]>

Answer 1

既然这是一个外部 DTD，那么您的 XML 文件中是否还有一个引用该 DTD 的 DOCTYPE 声明？如果是这样，您需要从 DTD 中删除 doctype。

这是一个尝试将其注释掉的示例：

<!--<!DOCTYPE items [-->
<!ELEMENT items (item+)>
<!ELEMENT item     (description, country, sellingPrice, cost, quantityOnHand, 
                    backorderedAmount, dateLastReceived, quantitySoldYearToDate, 
                    warehouseSection, warehouseShelve, remarks, supplier, supplier+)>
<!ATTLIST item itemNumber ID #REQUIRED>     
<!ELEMENT description  (#PCDATA)>
<!ELEMENT country    (#PCDATA)>
<!ELEMENT sellingPrice      (#PCDATA)>
<!ATTLIST sellingPrice saleItem (Y|N) #REQUIRED>    
<!ELEMENT cost  (#PCDATA)>
<!ELEMENT quantityOnHand (#PCDATA)>
<!ELEMENT backorderedAmount (#PCDATA)>
<!ATTLIST backorderedAmount dateOrdered NMTOKEN #IMPLIED>   
<!ELEMENT dateLastReceived   (month, day, year)>
<!ELEMENT month  (#PCDATA)>
<!ELEMENT day  (#PCDATA)>
<!ELEMENT year  (#PCDATA)>
<!ELEMENT quantitySoldYearToDate    (#PCDATA)>
<!ELEMENT warehouseSection (#PCDATA)>
<!ELEMENT warehouseShelve     (#PCDATA)>
<!ELEMENT remarks     (#PCDATA)>
<!ELEMENT supplier       (number, shipmentLeadTime, supCost)>
<!ELEMENT number  (#PCDATA)>
<!ELEMENT shipmentLeadTime  (#PCDATA)>
<!ATTLIST shipmentLeadTime unit (days|weeks) #REQUIRED>
<!ELEMENT supCost  (#PCDATA)>
<!--]>-->

在这里也可以看到这个答案：External referenced DTD in XML

如果这不能回答您的问题，请使用minimal, complete, and verifiable example 更新它。