You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: Change Detection and Notification of Webpages: A Survey 
Chapter Title:  Gives notifications to users on time. 
1. Abstract of Cited Paper (BIB001):  An end block adapted for use on a kiln car includes a refractory body having a transverse projection at a front end and a transverse recess at a rear end. The recess is dimensioned to receive therewithin a projection on the front end of another block with a loose fit therebetween. A sealing layer of resilient refractory material may be disposed within the recess for contact with the front end projection of another block.

Literature Review:
Optimized space utilization, and efficient way of monitoring types. Can lead to overloading of the servers due to the highly expensive computational cost. WebVigil BIB001 X-Diff [Wang et al. 2003] Compares 2 XML-documents depending on their equivalent trees. It generates a "minimumcost edit script" including a series of fundamental "edit operations" that transform a given tree to the other at a minimum cost. Provide more accurate change results as it maintains an unordered representation of the document where ancestor associations do a notable value addition for the result. May require a large amount of statistical information for the detection process. BIB002 This is a breadth first traversal algorithm and considers the changes in the document tree to detect the changes. Simple. Low cost of computation. Helps to reduce network traffic due to the usage of HTTP metadata. May not give sufficient information to the user.